Let's say you bought a bitcoin for $1000 in January 2018.
So you have to beat inflation and also the performance of other investments to say that your Bitcoin investment was a better investment, than other alternative investments.
Let's say your inflation is 5% and your best return on some other investment is %20 per year, then your Bitcoin price increase will have to be more than %25 to beat the alternative investment.
Let's say you hoard for 5 years, then you would need a price increase of 125% to beat your alternative investment returns over 5 years.
So we cannot have a price increase of 800% in year 1 and then a price decrease of %400 in year 2 and another price decrease of 200% in year 3 and so on...
Hope you get at what I am saying. Hoarding might be harmful to your profits, if you do not cash out SOME profit on the ATH.

..... You might end up with a bitcoin worth $100 in year 5.

I can bet some long term bullish individuals are going to be taking this the wrong way but indeed it is the truth, most especially when the ATH is not really something that looks so true apart from just some FOMO speculation.
There is a real difference between an actual demand and a FOMO driven value. Asides that anyway, anyone who is investing in a market should always know better to at least find a way to monitor the trend so as to know when they should be out of a market and when they should be in.