Investment in bitcoin can makes you developed reasoning on how to expand your income, most people who do holdings for a long period of time makes enough money at every running of bulls price and they begins to diversified their investment into different places. Some expands to mining, trading and physical business but when you eat you investment at every little price increase or drops you tends to remained statics, holding is a good option no matter the current price. Some people who became big bitcoin investors became it as a result of holdings.
You're right that if one hodl for a long time some amount in bitcoin, he will definitely make some profits irrespective of how small it may be, most investors targeted the bullrun and they set in before this begins hodl and sell after they have the satisfaction to do so, everyone want to invest in bitcoin and avoid holding their money in fiat because they have seen the beauty in bitcoin investment and what they stand to benefit.