Ofcourse i think that we must invest on altcoin because we can't jus sit and wait on one investment, we must ready for the risk and another way to recover our loss, and invest in altcoin is one of that way, but we need to do a research to know which coin that good for investment in short term or longterm.
we must analyze altcoin first before investing. because i think it will be harder to analyze than we invest in bitcoin. if btc we know for sure that the price will definitely rise, but not with altcoin