That's a good start, friend. You're putting in $250 for now, and then you can keep adding more using the DCA method. Before you invest any money, it's important to do your research so you understand how it all works.

Bitcoin can be volatile, but its volatility is different from other cryptocurrencies. When you invest $250 in Bitcoin, you're buying a piece of that coin. So if the price goes up or down, the value of your portion changes. For example, if one Bitcoin is worth $100k and you have 1 Bitcoin, and then the price drops to $70k, you still have 1 Bitcoin, but it will worth less in the market.

So to answer your question, if the price of Bitcoin drops below what you bought it for, you'll only lose the value you paid for it, but the amount of Bitcoin you own stays the same. Also, it's important to know that Bitcoin works differently from shares or Bitcoin ETFs. While both involve investing in Bitcoin, they have differences in what they represent, who owns them, how they're regulated, how easy they are to buy and sell, and the level of risk involved.