I personally feel that now is a good time to buy alts with bitcoin, sure it might go down a bit more, but I can't see it going down too much further than it is now. In my opinion the upside has much greater potential than the downside, for most of the quality altcoins.
This good time has been lasting for long. I guess, all, who wanted to invest in altcoins, managed to do it. The newbie can buy cheap tokens now - this is also a nice period for all beginners as they will spend less on crypto.