Bitcoin's History

Which of these was a failure of the Bitcoin protocol rather than of a company?

• Mt. Gox halting withdrawals in 2014
• The 2010 overflow bug that created over 184 billion BTC
• FTX filing for bankruptcy in 2022

Why is a block height a good way to date events in Bitcoin's history?

• Every block is exactly 10 minutes after the last one
• Each block has a fixed place in the chain and a recorded time, so anyone can check when it happened
• Block heights reset to zero at each halving