it's good to you, that is one of the best strategy to make profit, but for me we have defferent target brother, If I invest in a large amount of bitcoin, I will not wait to reach the highest price of bitcoin because of the bitcoin price stable on 14,000$ sometimes drop into 13,000$. so even if bitcoin price reaches 15,000 $ I'll sell my bitcoin immediately, it's okay even if the profit is small. i suggest you to monitor the market chart o price time to time so you know when to sell better.