Bitcoin FAQs

last updated 25. August 2019

Bitcoins are not backed by anything. Your government currency isn’t backed by anything either. The gold standard was abolished by President Nixon in 1971. Before 1971 the USD in theory was redeemable for gold. Now over 90% of government fiat currency is just numbers saved on computers.

Bitcoins have different properties that the market trusts. The inflation is fixed and cant be changed. There will only ever be 21 million Bitcoins. This is provable and verifiable. Bitcoin has never been hacked in its 10 years of existence thanks to the proof of work system that makes Bitcoin the most secure computer network in the world. These two properties make Bitcoin sound money like gold.


Bitcoins can be used online and offline. A transaction can be sent via internet, radio or satellite.

Opendime is a small USB stick that allows you to spend Bitcoin offline like a dollar bill. Opendime.com

Coinmap shows you places everywhere in the world where you can spend Bitcoin at retail shops. Coinmap.org

Bitcoin ATM Radar shows you ATMs globally where you can buy or sell Bitcoin for cash. Coinmap.org


Compared to what is Bitcoin too expensive? Compared to gold Bitcoin is very cheap. Gold marketcap: 8 Trillion vs Bitcoin marketcap: 0.18 Trillion.

Gold is 40 times more expensive than Bitcoin even though today one ounce of gold costs 1,490$ and one Bitcoin costs 10,000$.

Don’t fall victim to the unit bias. Just because the unit price of some asset is less than the unit price of another asset doesn’t mean it is cheaper.

Lets compare Bitcoin to another cryptocurrency.

One Ether costs 200$ today. If you buy 1 Ether you own 0.000001% of all Ether. If you buy one Bitcoin you own 0.000005% of all Bitcoin. 1 Bitcoin gives you 5 times as much percentage ownership of the entire network.

For 10.000$ you get 50 Ether instead of 1 Bitcoin but your percentage ownership in the network only increases by 10. In other words Bitcoin is only 10 times more expensive than Ether instead of 50 times as the price difference suggests.


Theoretically it is possible but it is very unlikely. Bitcoin has been number 1 for 10 years. Replacing a dominant technology is not easy because it has an established brand and strong network effects (companies, developers, users). The contestant has to be many times better than the current leader. There are only a handful cryptocurrencies with little improvements over Bitcoin and these improvements can be integrated into the Bitcoin code if they really prove to be big.

Every other cryptocurrency tries to market itself as somehow superior to Bitcoin. The supporters and marketers of these cryptocurrencies use transaction speed and cost as a metric for superiority. What they don’t tell you is that their technology sacrifices safety for cost and speed. Blockchains are inherently slow because every transaction has to be recorded on every node in the blockchain (computer in the decentralized computer network). So to increase speed these projects

  1. Increase block size
  2. reduce block propagation time
  3. use POS instead of POW

Increased block size increases speed and reduces cost because more transactions can be processed in each block. As fees increase when transactions compete for block space, larger blocks also reduce cost. This is only a temporary solution because the block size has to be increased proportionally to the use of the network. If it is almost free to use the blockchain people will use up the space to save any data they like in the blocks like property titles, contracts, images, anything they like really. So as transactions and files fill up the blocks and start competing for space, speed slows down and fees rise forcing another increase of block size. This becomes a vicious cycle.

Bitcoins solution is to have a fixed block size and a fee market where network users compete for space by paying fees. Layer 2 scaling solutions like the Lightning Network allow for cheap and fast transactions with Bitcoin.

A reduced block propagation time (every 10 minutes in Bitcoin) allows more transactions over a smaller period of time. This solution reduced safety because the time between blocks is an important feature against double spend attacks.

The more mining energy is spent between blocks the harder it becomes to double spend. So while businesses like to wait 1 to 3 confirmations for Bitcoin (10 to 30 minutes) they like to wait 20 to 50 confirmations for other cryptocurrencies to make sure that the transaction has not been double spent.

POS tries to use a system of incurring financial penalties instead of spending energy (POW) for safety. POS is unproven and untested at scale and would be less secure than POW.


Cryptocurrencies use public-key cryptography.

Bitcoins are not stored on your computer or smartphone. Bitcoins are just a number on the decentralized Bitcoin network (Blockchain).

When you buy 0.1 Bitcoin and transfer them to your Bitcoin wallet, every computer in the Bitcoin network (Bitcoin nodes) will save a copy of the transaction. In other words everybody knows that your address has 0.1 Bitcoin.

When you create your wallet you are given a private key. This private key gives you access to those Bitcoin. The Bitcoin are only as safe as the private key.

A convenient way for maximum security are hardware wallets like the Ledger Nano. The private key of a hardware wallet will never be on a device with internet and therefore impossible for hackers to steal.

Bitcoin has never been hacked in its 10 years of existence. The stories you read about Bitcoin being hacked always refer to companies that didn’t securely store their private keys.