I agree with you we all can be rich, but holding the bitcoin will not give us much profits. As it is gaining popularity i would suggest sell it on every increase and buy it on every dip, as you would be earning more with trading.
Time in the market > Timing the market
No one is smart enough to time a market as irrational as bitcoin. If you are a pro trader with a proven track record then sure, go ahead and trade. Holding is much easier, and most holders in crypto end up better off than traders. Patience prevails panic and fomo