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.
bit coin can exist life long. bit coin is nothing but currency so how can it dissapear. now mostly people try to buying bit coins for their needs. so bit coin has great demand to day. suppose with normal money we have to purchase and invest in something in business like that bit coins also we have to invest like that. really it is good investment to earn profit. bit coin usage increases then it's life time also increases maximum bit coin not dissapear.