Perhaps, people are buying low thinking and hoping it will grow in the future. But we also have to consider if that coin is really valuable or just a shitcoins for this will somehow affect what might happen in the future. Like, if you are investing in Bitcoin and Ethereum, we can really expect its growth and profit.
But as you have mentioned "many coins", I was afraid that some of them are worthless and you have been tricked with such a low price. I tell you that you better not expect them too much.