1) q day isn't coming. Certainly not soon. PQC work is in hand inside standards bodies. NIST made determinations here which people are following. Maybe blockchains will too.
2) it's all speculative behaviour. The amount of non speculative behaviour in this market is tiny. It could be millions of non speculative transactions and still be swamped by whales and market distorting behaviours.
3) buying land or other real goods or investing in services and industry is better for the world, but your returns across diverse investment will tend to the longterm mean of 7% not speculative monster multipliers.
4) there is specific speculation of Trump constructing a US federal policy toward bitcoin, including taking a position inside it, or changing the regulatory landscape. I think it's a bad idea but in these days, who can say bad ideas don't get air time?
5) realised value from crypto trading incurs tax. Don't be fooled into believing the gains won't be taxed. Don't be fooled into thinking they exist, are crystallised if they remain inside a chain. Nothing which generates this kind of value, speculative or not, avoids the eye of taxation, and forensic accountants I know say chains make tracing fraud and criminal assets and hidden profits easier not harder. The people who know how to avoid tax are the same people who kill for money. You'll be conned out of your asset, your life or both, if you pursue this aggressively enough with enough value.