With current market situation and that much low value you can go for bitcoin only and it is good for you to multiply your 120$ perfectly. This dump when is over might boost up the price well above $ 2800+ and guess what that will add up like more $100 to your current investment. Try it. :-)
Upon seeing the states of the coin right now i can say it is the best time to buy them and wait for it to pump up and we can multiply our 120$ in that but we should select those coin who is great and at a top of coimarketcaps. And try to make it a basis so that you could determine on how you gonna roll your money from each of the altcoin available and buyable there.