Choose ada coin/Cardano https://coinmarketcap.com/currencies/cardano/ you can search the data of Cardano on coinmarketcap, i choose Cardano because it is third generation of the blockchain, bitcoin is first generation of blockchain, it has the weakness of scaling, ethereum is second generation of blockchain it has weakness of scaling problem and security too, so ada coin Cardano is best choice its price less than $1 or if you have large of money, EOS is best choice too.