While the blockchain remains inmune to attacks there will be no problems with bitcoins, but there's nothing to do against tech so we don't know certantly what will happen.
yes, as long as blockchain is there, digital currencies should be there as well. But who knows? we are on a state of evolution when it comes to technology and i believe this is the start of the future with just signs on our planet, mankind will always develop better technology than before.Agreed, bitcoin is only useful if people have access. Just because I tell someone that they have $1mil in a bank account doesn't mean that it is good for them unless they can access that account.