Let's say if I had old-school BTC, mined personally or bought back in the day for very little fiat currency and today it's an enormously larger sum, I'd say it's time to not keep all my eggs in one basket and rebalance my portfolio.
For example, I'd say it's actually been time for a while now, ever since the crypto-tax wave start to hit, to convert into fiat currency and buy land, houses, assets that, IF the state doesn't collapse and they're chosen in reasonable areas, could still preserve significant value, allow you to flee to another country (houses purchased abroad) if necessary etc.
If someone had put 0.001% of their capital or even 0.01% into old-school BTC and today finds themselves with 50% of their capital in BTC, it's high time to give some thought to diversification.
Smart contracts will become the contracts of the future and NFTs will be digital identity is pretty obvious; we don't know WHO will be used by whom for these tasks, but it's clear that this is what they'll be because they're the most functional choice we have in the trend toward rules as code. The problem is that the market can stay irrational longer than we can stay solvent, so it's a gamble, but also a logical diversification in its own right as well.
The only highly uncertain element is the miners' ability to withstand long periods of loss.
