By checking coinmarketcap in Crypto has so many trustable and profitable coin. Check those coin like Ethereum Blockchain, NEO Blockchain, TRX, MIOTA are good promising and trustable coin. Some people also like new coin NPXS, CS.
With so many potential coins in the cryptocurrency, this can make us confusing to choose the coin and sometimes, we can make a mistake by choosing the wrong coin. You need to check the coin position, the current price, the details of the project and everything about the coin so you can decide if that coin can be a good selection for you or not. Yes, it will need time to get one or two or more to find out the right coin, but if you can get the right coin, then you will not waste your time to find the right coin.
Most trusted altcoins? We all know we can't put our 100% trust in altcoins because of the price is volatility. Honestly Bitcoin and Ethereum are my only coin that I trusted, I believe in the future it will be more stronger.