Why are records written to the blockchain so difficult to tamper with?
Bitcoin produces a block about every 10 minutes. After Ethereum switched to proof of stake, it began producing blocks in 12-second slots.
A quick tip: You can check the confirmation status of every transaction using a blockchain explorer. When you receive coins, you can look it up using the transaction hash.
Bitcoin was the first blockchain system to operate at large scale. $BTC is the native currency of the Bitcoin network.
Only invest what you can afford, and leave yourself plenty of room to spare.