Until somebody invents a quantum computer with a sufficiently large number of Qbits. Then they can completely destroy the blockchain.
Alternatively, wait a few hundred years until you need several hundred terabytes to store the blockchain, which is required for transactions. That's going to be a problem.
Or you could switch to Bitcoin before realizing that currencies which deflate in value are a terrible idea.
(For the record, I support cryptocurrency. I just think Bitcoin has too many issues to be viable long-term. Nice proof of concept, but it needs to be refined).
Alternatively, wait a few hundred years until you need several hundred terabytes to store the blockchain, which is required for transactions. That's going to be a problem.
Or you could switch to Bitcoin before realizing that currencies which deflate in value are a terrible idea.
(For the record, I support cryptocurrency. I just think Bitcoin has too many issues to be viable long-term. Nice proof of concept, but it needs to be refined).