Wouldn't the rational choice at this point would be to acquire real estate (like Gate's buying farmland) and investing in tangible assets that won't be susceptible to Q-day worries? Or if one "invests" in crypto, at least buy quantum-safe cryptos?
The real value of bitcoin isn't the algorithm, it's the address balances, viewed as a more important scorecard than the rest of crypto put together. Those numbers can be moved elsewhere, if necessary.