Now is the time to buy Bitcoin, as their further growth is expected. If you have free money, you can invest it in Bitcoin and just wait for it to grow. It makes no sense to twitch and try to earn on fluctuations. Cryptocurrency will reveal its potential only in the future by 2020.
Even we saw the growing market but we don't be confident enough cause nobody knows what is exactly happen in the coming days. A risk of investing crypto during bull run will be more higher that during the bear season. If you are a risk takers then, its up to you to decide and so nobody could be blame in the end.