Base of the graph in the market and base on its statistics bitcoin and most of the altcoins are now going upwards and the value are rising again. So I think you are somehow late to buy and invest on any coins but a better opportunity to those who holds coins.
It seems to me that it is still too early to talk about the restoration and the growth of prices for coins, since a similar situation has been repeated many times, and this kind of growth lasted no more than one day. But I would like that it would not be so.