Other thinks that it's okay to have a debt while they're invested. They don't realize that they're just getting something from their investments which they're also going to pay to their debts.
There are times that debt/loan is good when you put it on an investment because you will have access on extra capital that will give you more profit. This is only advisable if the potential income is greater than the interest rate to cover the debt and eaen at the same time.
A good debt is when you've got a stable business and you're going to do it for expansion or when you've got a plan to increase your production. But with an investment, which is like floating and you have no idea if it's going to be good or bad, that's a bad debt.
On crypto investments, debts is indeed crucial and subjective due to the volatility of the market. It’s a high risk high reward since you can pay your debt and get huge profit if you invest on the right time and right coin such as Bitcoin.
A one time bull run can give you sufficient profit to cover interests rate and even the loan amount itself.
That's right, it is not advisable to get into investments in crypto using loans. How many have we seen those people that have done the same thing, most of them regret it and if there were successful ones, they're just few.