Bitcoin? If there's a need for something, people will find ways to circumvent laws and tools against it. In a completely cash-less world say 100 years from now,

Bitcoin? If there's a need for something, people will find ways to circumvent laws and tools against it. In a completely cash-less world say 100 years from now, the Bitcoin we have now will seem like version 0.01 of the anonymous digital money we'd have then.