I don't think like that, I think old coins are still profitable. maybe there are some old coins my price is down, but in my opinion this is a natural thing. just try to look at the data on the graph
Sort of it is. There might be a changes or some of the coins, old coins, to be exact meet its maturity. Therefore they failed to continue there fame. But then as we can see bitcoin is the most old coin, it is the first created and we can see that it os still the king and continue to reign.