I believe altcoin is still productive, there are many types of altcoins but not all altcoins are productive, but I am sure the altcoins that are in the best coin market list are certainly productive and many supporters, if the altcoin development gets better the altcoin will be more productive and many will invest in altcoin that is
The most important thing is patience, as we know that investment certainly requires patience and is not instant, crypto is a good opportunity because it is currently very popular.