^ Diversification is a key strategy in managing risk when it comes to BTC and other investments. Relying solely on BTC for income could expose one to unnecessary financial risks if the market turns bearish. For me, having multiple sources of income and investments, as you mentioned, is a prudent approach to ensure financial stability and avoid the impact of market volatility.
It could be the concept of (buy and hold) was suitable with a long-term investment strategy, where investors aim to capitalize on the potential for the market to eventually shift into a bullish phase, allowing for greater profit potential.
True that but we should also moderate the diversification of our investment. We must make sure that we can manage them all. Diversifying too much to the point of not be able to manage them correctly is way worse than a single investment. Many investors lost a lot of funds due to not being able to manage their investments. They act too late whenever there is a news resulting to a loss. So when diversifying investment, always consider our ability on how many investments we can manage.