that's right now that's the right time to invest in altcoins because the price is so low today so I'm sure that when your altcoins holds up and is sold it will cost you a lot of money.
For me, I follow simple logic in buying and selling alts. I buy alts when the coin that I want to buy reaches very low drop percentage or better all time low. And sell it in all time high, or the raise value gets to almost 25 percent plus.