Now let's speculate, as I'm doing a similar thing:

Say you have a stable monthly income of $3000 < your income which you are going to be paying for the monthly payments.
And you have more than the money you want to borrow already in a fund < your crash fund.
And you want to take a loan about $12000 to invest in your preferred coin.
The bank would ask, say $13000 for that loan, divided in monthly payments, at around $1080.

Given the scenario above, if you can be contend with $1920 income per month. Than I don't see why you can not make this work even if you suddenly become unemployed.

The discipline here is have enough buffer to tolerate risk of flash crashes like yesterday + not become greedy + follow the coin you had. For example, if you had a cold feet, simply sell your coins and sniff around a little before going back in.

Put stop loss orders and update it regularly to match to %20 of the current levels. < this is tricky. Exchanges tend to not obey the limits if a crash occurs. Simply because there won't be buyers at that level. This certainly complicates things.

Should a crash occur, try to buy at dips.

Don't spend the coin gains from the money you borrowed. Keep it in the system or in a separate account.

If you find your gains enough to stop the scheme, please do so. What's your target? I set my target to %50 gain, so as soon as I see that, I'd pay the loan early.