I think the problem with people who choose to go into bitcoin investment is that they lack the knowledge about Bitcoin and they end up diving in with the misconception that bitcoin is a get rich quick scheme. They believe once they go into bitcoin, they'll suddenly become rich after investing some amount of cash. You can invest thousands of millions of dollars in bitcoin but still fail and lose all or almost everything if you don't have the required knowledge and if you don't know the right approach and technique to use while investing in Bitcoin.

There are lots of approaches to employ when thinking about Bitcoin investment, so it's left for you to conduct and extensive research and come up with the approach best suitable and productive for you rather than just diving into Bitcoin without full preparation. This is often what causes people to lose money in Bitcoin investment.