So to the point: Would you quit if a centralized shitcoin managed to surpass Bitcoin in marketcap? At that point it would be clear that entire space is a joke. Bitcoin would still march on as usual, but it would be just sad to see people putting their money on shitcoins rather than on the only actually decentralized blockchain worth anything.
why would I? just because bitcoin got surpassed doesn't mean that its value is lost. l just can't of any reason why would I quit/leave bitcoin just because another cryptocurrency surpassed it. also, quitting bitcoin just because another cryptocurrency surpassed bitcoin is just shallow(which is sad).