Monero coin is in the top 10 of all cryptocurrencies in the world. I think that it is very promising and I keep it in my portfolio.
Monero is the only coin today with completely trust-less privacy and anonymity, unlike ZCash-family coins based on zk-snark algorithm that depends on initial secret key generation trust.
Also Monero is the only coin today with long-known and well-studied Cryptonight algorithm, published and discussed in peer-reviewed scientific journals since year 2000.
Other coins attract users by either sparkling but unverified new ideas like ZCash/zk-snark or just hard PR management like Dash.
There are many areas of human activity to get spontaneous risks, like smart contracts, internet of things, etc. So may coins like ETH, IOTA, etc. offer you a chance to get risks.
But, privacy and anonymity is other completely different area. If you want to stay anonymous and private, you apparently don't want to get risks. That's why Monero is the only reasonable private and anonymous coin.