Those who sell when they make a small profit are not investors, they are short-term traders. If you want to invest in Bitcoin, you must have such a mentality that my invested money will last for a few years or centuries and I will survive here until the end. Basically, Bitcoin is for those who are patient, not for those who are in a hurry.
Bitcoin investment isn't something that needs to be rushed although there are tons of person who have even gotten the idea of bitcoin through the perception of bitcoin being something thats very easy to make quick funds from which is entirely not the case as with bitcoin investment you will have to sacrifice alot to keep your investment standing strong if not you are gone. But the fact still remains that not everyone is willing to have the mindset of playing the patience.
I think the only sacrifices you need to benefit from bitcoin is by staying consistent and patient. Bitcoin is not a get rich quick scheme, where they tell you to invest $1000 and get $10,000 same time next week. No! Bitcoin is exceptional from any scam activity that is if you follow instructions, because aside investment some person might make some mistakes in providing making deposit to the wrong address probably by ommiting one character and send to the wrong address and start tagrin bitcoin a scam. Those who follow instructions to cross check before making payments and hold for long can testify of the profits they've accumulated so far. You know is very nice and fun to watch your portfolio grow in profits as you are consistently accumulating from whichever strategy suite you, the most important thing is that you hold for long and buy staying patient without making short term withdrawals.