This is a general sanity check for (Bitcoin) investments: To ask yourself why the company is seeking investments not from VCs that can lock large amounts (>$1M if needed) away for a long period without questions, but instead from Joe Average with his $50 in Bitcoin who may make regular support requests.
Just as important question: why do they need ever more money, spend a lot on advertising, referral programs etc ? If they really could achieve >3000% YoY, you'd expect their own capital to grow at an insane rate, and therefore they would need less external capital over time, not more.