It is best to invest in Ethereum,Nano and waves these are valuable coins to invest.These coins will make a lot of profit in the future.Altcoins are good for small investment and the need for ethereum is increasing.So I think the price of altcoins will increase several times by the end of this year.
Nobody argues that these are good coins with great potential, but do not expect them to grow if the falling market trend continues in this case it will not happen likely...