OPEN, should’ve bought more. But help please??

Hi, I have 6 calls for with a 0.5 strike , exp Nov 21, 2025 with a break even at 3.88. If I sold yesterday I would have made 1000$ but now if I sold today, my profit would only be 554. Please help me understand how the profits are affected so drastically even if the price only went down .50 from yesterday? I expect OPEN to hit 10$ by September/October but as a newbie in Options, I’m still learning how theta and everything affects my calls and if I’d even profit just as much if price hits 10$ in a month vs just profiting at 5$ without a month time decay. Thank you!