the prices will always go up ...
In finanancial ecosystem, prices sometimes up, sometimes down.
It's alway true for crypto ecosystem, including Ravencoin.
If you have coins, you should take profits at your most appropriate specific point of time, then wait weeks later to enter again by buying coins back at much cheaper prices.
No thing, no crypto coin can raise forever.
Exactly that is part of healthy growth ups and downs if price continuously goes up than it is just pump and dump which very dangerous for any ecosystem. Totally agreed with you Raven is on the way to grow rapidly it looking solid project and their development plan is really impressive.