Judging by how often Monero used for malicious miners, the output itself is nappasive. Monero is really safe and anonymous if you need it.
Well Monero is mined by bots because its algo is CPU friendly. Also algo is at least 2/3 of time ASIC resistant. This is what matters most compared to ZCash. Compared to other coins it matters volumes on exchanges. So bot operators can exchange coins with ease.
each project will be used to one degree or another for certain purposes, if it is beneficial for someone. If the coins are anonymous and give the opportunity to use for fraudsters, then they will be relevant precisely in that field of human activity. But if some kind of coin is safe for big business, then its development will depend on investments from big business.