In short, it is our effort that brings food in our table. Bitcoin is just one of the currencies we received from that services so I think it isn't correct to think that it is the Bitcoin that gives our food to our table.
In real life also we have to earn food for ourselves like by working and earn money similarly for Bitcoin also you have to do some work or put efforts to acquire it any way you find possible whether it's investment or you want to earn it.It is a currency as well as investment asset which can bring you anything you want we can measure in terms of money.
It can provide us with the sense of making a profit coming from investing in Bitcoin but if we do nothing or invested wrong, losses are what we gonna get.
In fact, many people become rich from investing in Bitcoin, many lives had changed, and many more as long as we are smart people. Perhaps, the idea is good but too risky for those who never understand and of course, for those people who just think easy money and profit quickly as this will never work for them.