Of course buying Ethereum now is not smart. THe trend is bearish so there are big chances that the price will move down again.
buying in bearish trend like cacthing falling knife.we could hurt when trying to opposite with the trend.but for long term, at this moment ethereum price cheap enough.
It is cheap and it can be cheaper, but no matter at which price you're buying, buying ETH is always a good idea, it's top altcoin and with huge potential at that.