Personally, I would not invest in Monero. Yes, this is a good coin, but it seems to me that the price of this coin will not grow 2 times or more.
It went down 5 times, why off suddenly would not grow 2 times or more anymore? It will grow 100 times. and not that much into future.
If the price went down by 5 times, then there will be a solid reason behind it. Don't you think so? Unfortunately for Monero, it looks like other cryptos such as Zcash and Deep Onion are encroaching on its market share.
Yes it was a solid reason behind it. At end of 2017 crypto was in state of a hype. Everyone grandma was rushing to the closest exchange to learn that they dont accept new customers. That hype worn out. And price of Bitcoin and Monero fall down to almost bottom that should happen in September. Then after like half year time it will slowly start growing and going full hype mid 2020. Monero will before that made some spikes comparing to Bitcoin. As it did so far. Usually goes x3.