It is not worth, the fees of mining is very high because of difficulty, i am we can be return of investment and it is very dangerous because mostly cloud mining service are scamer, although there is cloud mining service that can be trusted like hashnest.
Whether or not a certain cloud mining site is really legit, it's simply not worth the time and money you invest in it.
Maintenance fees are too high in regards to the very low rewards you get per found block.
It's much better that you just keep your Bitcoins in your wallet as a long term investment. It saves you a lot time, money and headache.