There was a perception about the increase in the price of Bitcoin a few years ago. I think that the price has increased much faster than it has come to this day.
I think that those who invested some money in Bitcoin a few years ago have exceeded their investment expectations today.
Bitcoin investment does not guarantee any profit. Even if you hold it for a long time, there is no guarantee that you will make guaranteed profit, similarly there is no way to say that you will face a loss. However, if you can hold Bitcoin for a long time according to your ability, then you can definitely build a large Bitcoin portfolio that can help you become profitable in the long run. The price of Bitcoin has changed drastically in the past few years. This will continue in the future as well. But those who do not accumulate their Bitcoins after a long time may be the ones who may lose. If you have excess money after making necessary expenses, then investing in Bitcoin can be safer than any other platform.
Using the expression extra cash, left over cash, or discretionary income would have been more better than using excess money in your expression which sounds more ambiguous to me, it sounds more like one needs more than enough prior to starting bitcon investment since anyone can come in with as little as what can be called left over money when our basic needs has been taken care of.
For me there is no cash that is left over cash because human needs are unsatisfiable. The cash you call left over is only that you have not really though of investing it or use it for a particular need. What people call leftover cash can quickly be inverted to Bitcoin andnsabe for the future because there is a saying that 'the money you save today will save you tomorrow' this is why I have chosen to save my own money in Bitcoin. Investing in bitcoin is something you need to have a set goal. First you need to have a source of income and set outside the cash for your basic needs and also set outside emergency fund so that you will have a relaxed mind as you will be able to keep your investment growing. As I was told in this forum that using DCA is the best method of growing your bitcoin investment which have been working for me and also to start quickly as possible as procrastination may lead to had I know.