Then if we think we are not the good type that can know when exactly is the best time for an investment to be taken, then we may only have to wait and hold with our asset, till the market pump and be in our favour before we can sell, which is best approach for anyone to take and be more safe.
I don't understand what you mean by the best time for an investment to be taken. Bitcoin investment has no best time to get started to to buy bitcoin. A new investor or a low coiner doesn't have any business with the market condition because it's hard to know what will happen next in the market. This is why they should start their bitcoin investment immediately provided that they have their discretionary income available irrespective of the price of bitcoin at that moment. Bitcoin is a long term invest and the price increases overtime. waiting is never a good approach for long term investors in their early bitcoin accumulation phase.
You should only start thinking of selling when you have reached your bitcoin target and enter into the over accumulation stage, so that you don't sell too many bitcoin too soon. A no coiner and a low coiner should only be focused on buying regularly, weekly, consistent and persistent for an ongoing bitcoin investment for 4-10 years and above. If you put profits first, you will end up changing from a long term investor mindset to a trader because whenever, you see a little profits, you will not be at rest until you take it.