Protein folding can't be "solved". For a small protein of 100 amino acids, there are 2^432 (20^100) possible combinations (http://xray.bmc.uu.se/~lars/biowww/Proteinfolds.html). Bitcoin's SHA256 has only 2^256 possible values. So in a practical sense protein folding is a harder problem that Bitcoin mining.
Under the assumption that protein folding does get solved, we will simply transfer to the next humanitarian distributed computing platform out there.
We would not even have to decide what this is, we could leave it up to the holders of FLDC. We have a voting system (something that a traditional Altcoin cannot do) that allows us to distribute vote tokens to FLDC holders. http://foldingcoin.net/fldc-voting/
I hope protein folds fun out, then we would understand damn near everything about the human body, then i guess my next vote would be to help SETI and discover the aliens :D
