Hypothetical, far-fetched scenarios often have a way of bringing us closer to real-time solutions. If you must spend 500.000 on five different coins, what do you get? Let's say you have to stake them locked, too, just to add a layer of diamond-ness to the case.
Opportunities are always around in crypto, and significantly more so than any other market nowadays - or ever. As a counterargument to #diversification - one investment will almost always significantly outperform others within a particular timeframe.
As for me, $BNB ETH & BTC remain the staple trinity, perhaps in that particular order, too. The rest would be $XRP & $SOL .