I recommend that you buy at least until you reach 1000 XRP. If its price reaches 10 dollars, you will have 10,000, but if its price reaches 100 or 1000, do the math

I'm kind of a newbie, I have a question, I have 220 xrp's, when I sell at a higher price to buy back at a lower price, do I sell everything or just a part? What is more worth it?