I wanna know how many years bitcoin can exist, because what if i invest a big amount and the bitcoin will go to shutdown or going to close a blockchain system. This is my concern.
We cannot say how long bitcoin will exist in the universe for as long as the investors would continue to invest and support the crypto currency it might exist for a long period of time maybe 20, 30 or 50 years we cannot tell. If invest you should secure your wallet. I think it would not close the blockchain system.