Since you have already noticed that the price of Monero coins is quite high right now, I think it is not yet the good time to buy this coin although you can observe a continuous gain, you will be just gaining a small amount of profit since you have started on a real high price of it. It is also quite risky in a way that whenever the price of the coin drops, you will be encountering a real hard loss in your investment. But it is still up to you if you will tend to take the risk on buying Monero coins on the current price of it.