If you take money from your relatives, without interest, then why not?
In 5 years, perhaps we will see 2 more bull races, which means you will win back your money anyway. It seems to me that in such situations the risks are very low, it is important that you fix the profit on time.
Well, borrowing for business is okay, especially if it doesn't use interest. however, you need to make sure that your place of investment is really guaranteed. Well, in the cryptocurrency world, it's quite risky, unless you believe in it, and can handle the risks. well, but all business is risky. DWYOR is at the heart of it all, and I suggest borrowing it when you are sure of it.
That's the important piece of it, trusting this venue and have that nerve to work along the way. Tracing back from the last 10 years this market gained lots of interest and if that will continue to gained for more, then the chance that your loan money will grow.
Unless you'll failed to follow the right path and make a wrong decisions while you are engaged with your investment.
We don't know what future will bring but all depends from how you trust your knowledge and guts while choosing your investment.