HODL doesn't work every time and should not be the only strategy that an investor should look into. If you really don't have the time or have the appetite to learn about the market, then HODL can work for you. But, if you are a risk-taker and want to learn, I would suggest doing part-time trading with a partial investment. The rest you can hold and see it grow or shrink with time. Also, investing in the right coin is crucial here. If you invest in the wrong coin, HODL will never work. Click the link in my signature, I created videos of my results.