Actually I may not understand your definition of investment but I totally disagree with your definition because the only reason why people chose to invest there hard aim money to anything, they have the believe that in some point in the future they would realize some profits, so the main purpose of investment is making profits at the end, I no that there are other business that most people venture into and at the end they failed, which is as a result of venturing into wrong business, so perhaps that's why Bitcoin is a game changer for those who believe on it potential because in as much as I may not know what will be the exact worth of Bitcoin in the future but one thing that's for sure is that if you keep on investing on Bitcoin you will be happy with the outcome in the future and also there is no way your investment on Bitcoin will failed unless is actually from you.

Also in terms of having source of income, we have actually discuss it here more than twice that in as much as it may seem very important but with a proper planning you can start accumulating Bitcoin even when you don't have a steady source of income and before you know you have gotten a good amount of Bitcoin in your portfolio because many have tried and is working for them so perhaps the earlier you realize that the better.