i would be Move onto another coin
Yeah it's a pretty precise decisions. but from that I know or think, it all will be the same thing or it could be said that altcoin has a very great relationship in the bitcoin. So if bitcoin died then altcoin will also join died, because altcoin have intake or something to be done in the bitcoin. Except for altcoin which already stands alone and does not involve the bitcoin in some ways especially on their selling points