Now is a very difficult time for the crypto currency. When the market grew it was possible to invest in any ISO and collect profits. Now you need to carefully choose what you are investing your money in and choose good projects in which you believe yourself.
Yes, it is very strategical to buy altcoins right now since a lot of these altcoin's value are still at a very cheap price, therefore you could buy tokens from ICOs at a very cheap price. I myself wouldn't let myself miss a lot of opportunity especially when it comes to earning money. A lot of altcoins have potential so it is very strategical to buy tokens from these altcoins and wait for it to get crowdfunded and increase in price.