Investment in Bitcoin is much easier when you knows the right thing to do at the right time because you wouldn't have to make the wrong decision that will compel you to sell off your holdings even when you ought not to.
As for this your statement here, it's actually the wrong approach when investing in Bitcoin, you only invest in Bitcoin from your discretionary income (money left after all basis needs and expenses have been met), not from your source of income as you claimed, because their are so many guys out there that has a source of income but still can't figure out their discretionary income, so investing from your discretionary income is a must if you want to be successful in your Bitcoin investment, not source of income as you thought.