The point of Bitcoin isn't to give everyone self-custody of their money

It's to ensure that the base layer of money is incorruptible

Nobody has the power to manipulate the supply of Bitcoin

Nobody can steal your Bitcoin by diluting your holdings

There will never be more than 21M BTC

They also won't be able to take your Bitcoin away by decreasing the supply or reversing transactions

Eg. The US government sanctioned Russia and "deleted" their US Treasury bonds

In the next ~30 years, the majority of people will be using Bitcoin in some way, but they will never interact with the blockchain