So, as long as bitcoin is concerned. I am proposing that the statement be changed to "Invest what you want to invest". Yes, if you have $10k and you want to use $4k for investment, use the 4k. Don't go and invest $50 because it is what you can afford to lose. This is for bitcoin and I hope you guys will understand the angle I am coming from
Whatever rocks out boats and helps us to invest wisely, I am all up for it. Whether it is in investing what you can afford to lose or investing what you want to invest, the conclusion is that invest wisely. In my estimation that comes with using the dollar cost averaging method to invest strategically at your own pace in whatever market conditions without feeling under pressure. It helps a lot.