It may not be a very bad idea to borrow money to invest in Bitcoin once you are capable of paying back the loan. However, it is not encouraging to borrow money just to invest in Bitcoin, because you will still need to pay back the money, including the interest. Instead of borrowing money, why not buy Bitcoin gradually? Why not continue buying, even with the little amount you may be getting monthly or weekly? This approach will serve DCA method where you acquire Bitcoin at different price levels.
Borrowing to invest in Bitcoin will never give someone peace of mind. Even if the person decides to hold for a long period of time, it will still cause worry at times, as Bitcoin's price cannot continuously move in one direction. It will always fluctuate, going up and down.
Investing in Bitcoin is not like starting a business where you need to gather everything customers require, which often demands large capital. Instead, you can start small and build your Bitcoin investment over time.
If you start investing by following all the rules and regulations, or if you have deep knowledge about investments and are skilled in financial management, you will not need to take a loan for investing. Taking a loan for investment means that your financial management is not good, your income source is not wise, or your backup fund is not strong or planned. If you are taking a loan to invest due to a lack of money, it indicates that your income source is not wise. If you are taking a loan to be aggressive in investing, it shows that your backup fund is not planned. If you have to take a loan in an emergency or in the early stages of a need, it means your investment plan is not solid.
In other words, if you plan to invest with the knowledge of investment rules and long-term maintenance, you will never need to take a loan (at the initial stage). With proper financial management, taking a loan might not even be an option. If you find yourself in a situation where you need to take a loan, you will realize that there is a gap in your plan, and you need to identify and correct that gap.
Try to invest with the cash you currently have, even if it is a small amount. Taking a loan to invest is a bad habit, and it is better to avoid it. I will never invest on credit under any circumstances. If necessary, it may be better to temporarily stop investing rather than continue with loans. Taking a loan will never yield positive results for your investment. In fact, a loan might be enough to make your investment fragile.