You can investing your money in multiple altcoin bu do not choose without check on coin market cap altcoin, always buy with top altcoin on crypto market like ether, bch or ripple. Never buy altcoin have under one hundred position in exchange market because is not have potential higher price at the future.
But investing on non top 100 currency in cmc is also good for testing our luck, like 10% of our portofolio investing on not famous coin because the price pump could be more higher if the coin's future is good
It is always a wise decision to check in CMC before investing, even top 100 is no guarantee because there are some coins through their market volumes to rank might change. That's why we should always check from the past 3 years of their volumes and their development activity for investing in it.