I have been doing this for years. While I have been lucky to consistently pull a profit, I never invested more than I could afford - and I certainly never planned to see a single cent I invested return to me (as one should assume with any investment).
If you are buying any cryptocurrency with the expectation of reselling at a profit, and you are falling into more debt than you can afford to be in while doing so, the issue was never cryptocurrency, but rather your willingness to borrow more money than you can afford to pay back.
Given that profits were never a guarantee, anyone expecting guaranteed profit already exhibits the kind of high-risk financial decision-making that deserves a low credit score as a consequence for unpaid debts, regardless of what they spend the borrowed money on.