If you are taking partial profits from your bitcoin investment within a short period of time means that you are a trader and before you know it, you will feast on your bitcoin investment gradually killing the focus of building and growing your bitcoin investment overtime. Anyone investing in bitcoin shouldn't use money for his important needs to invest if not you are gambling and not investing since you will sell immediately your needs arises, and if bitcoin price is below your entry point, you will run at loss. Such people will call bitcoin a scam because they didn't invest in the right way with their discretionary income.
It is important before investing to prepare an emergency fund first, so that when there is an urgent need not to sell bitcoin in the middle of the road, anyone who provides emergency funds will be safe from any needs.
So it is not surprising that someone calls bitcoin a scam because of the wrong way they rely on bitcoin in times of urgency, investing in bitcoin must indeed be done in a mature way so that this does not interfere when the plan has started from far away.
Must manage cash flow income well.
Save for emergency funds.
Determine what percentage for DCA from your income.
The rest can be used for living expenses.
Then the investment will not be disturbed.