I've been trading crypto for about a month now, and from what I've read of your article I don't think I'm as invested as some people are.
For me, I watched and learned for a long time before I actually jumped into the game, and I'm trading with entirely disposable income.
It was actually a government Covid stimulus check that was my initial investment.
I'm mostly in BTC and ETH so they're relatively reliable assets as far as crypto goes.
When BTC tanks I don't sell anything at all, and instead try to buy more at the bottom.
It's a long read so I've bookmarked it to come back and finish but it's been an interesting read so far!

I've only been trading on Coinbase Pro, and seeing your mention of Bitmex's cheating makes me feel good about sticking with Coinbase. The only thing that might draw me away from CB would be some alt-coins that they don't offer.