Honestly, I think it is not safe to invest right now because I'd you are planning on keeping it long term, waiting for the bubble to burst is wiser for better profits. Also, segwit2X fork is near and it doesn't have replay protection. So long as one sells their B2X, they are selling btc as well that might drive price downwards. For this reason it is wiser to buy after the phenomenon's hype has calm down for better prices. You can also enter just days or weeks after it.