Yes, Monero is anonymous and a cheap transaction fee coin. But more importantly, most mining softwares, add-ons, extensions, website etc. mine Monero and then convert it to Bitcoins and other crypto currency . So in that way, it will always be in circulation and use. As far as how good investment it is, I think it might give you average returns, but don't expect any magic from it. Zcash, Dash etc. might give you better returns in the same category.