Hello everyone, Bitcoin works on the principles of supply and demand. If the rich people own majority of the coins and decides not to touch them, the remaining coins will become more valuable since the supply of it becomes scarce. That is if only they own all the coin. If there is still coins in circulation, Bitcoin cannot die. There is no problem with it, we can easily increase the number of decimals and people would continue to use Bitcoins in small denominations. Thank you!