It is not adviceable to use a line to invest in Bitcoin because it will definitely affect your purchase of Bitcoin and the loan can force you to sell your Bitcoin when you are not determined to do so, and so you now go back to zero level,since loan comes with interest rate, how do you pay it off, what about the collaterals for the loan aside from the interest rate, how well will it be met with the time frame, it is better you have an alternative source of income to add to your salary and start building your portfolio,that is why it is adviceable as a new investor in Bitcoin, you start with the DCA strategy which will help you buy Bitcoin little by little buying and HODLing it for a long-term.
When we are holding bitcoin, our plan for bitcoin should be a long term investment, nobody knows when bitcoin is going to pump or dump, if we end up taking loan to buy bitcoin, and it’s start dumping, how will you be able to pay back your loan? So if you don’t have any other sources of income to pay for the loan, then avoid loan to invest in bitcoin.
If Bitcoin was a pump and dump coin, people wouldn't have shown great dedication and passion to invest their money into Bitcoin for the long term, so you referring to Bitcoin as a pump and dump simply means that you don't really understand what Bitcoin is, even though you have been long registered on this forum. Bitcoin is a solid project built to solve real-life problems, such as using bitcoin to send money to your loved ones abroad in a seamless manner. Yes, I agree with you that people who don't have any means to pay back their loan shouldn't take a loan to invest in bitcoin because they will depend on their bitcoin investment to pay back their loan, which will probably cause them to sell their bitcoin too early to pay back their loan. But if anyone has a means to pay back his or her loan without him or her selling his or her bitcoin, that person can take a loan to invest in bitcoin since the reason behind that loan is for a good cause.