I see alot of altcoins and tokens been introduced into the market every day and I keep wondering if that is how this industry will keep growing. The number of altcoins does not translate to increase in the over all market capitalization of the cryptocurrencies market and it that means that some of the coins we currently have in the market is not needed!
The difference between altcoins and ordinary gem coins lies in their buying and selling values, so they have a very different place, generally people see gem coins in the top 10, while altcoins are far below.
As for investment there is no relationship between gem coins and Altcoins, usually investments are made on the basis of existing opportunities, whether normal conditions or not, this can be seen in current market conditions. If you want to invest, at the moment the market conditions are very good and almost all coins have the opportunity to go up, both long term and short term.