I think that you don't get the idea: instead of selling bitcoin and PAYING up to 50% in taxes, you get cash that you need now. Then, for example 3 years later (of course you borrow somewhere close to the peak price) when bitcoin is at ATH, you can use a FRACTION of bitcoin that you borrowed against to close your loan. Taking a loan would be having the necessary chunk of cash now, but effectively selling bitcoin at a price of 3 years LATER.

At LTV of 25% the interest is 1%. You can't get a loan like this when you buy a house, at least in US.

I am not planning to either sell or take a loan at the moment, but this "method" surely beats selling and paying a HUGE amounts of tax.
All rich do this. How do you think Musk had billions to invest in Space X (he borrowed heavily against Tesla stock to the tune of billions)?

TL;DR Want to pay lotta tax, sell; don't want to pay tax (lawfully), take a loan.

EDIT: you can also use a part of the loan to reinvest in bitcoin options, if you are super bullish or bearish and leverage your position.