Only share ones which legitimate i.e has real products out in market!
The most successful encryption project is undoubtedly Bitcoin. Of course, if don't count it then should be Ethereum. These two should be well deserved first and second. Of course, these two are just representatives of these successful projects.
I agree with you as BTC and ETH are the strongest contenders in CMC table. These days I do prefer for ICO's as it gives good profit and yes we need to research on our own about the project as most of them are scammers in we have to be careful, this crypto market will benefit you with profit. Patience is desperately required here for good return.