The best time for buying is at low price and I think if you sell your coins with profit then you should not regret after Fluctuations in coin price because you have already taken your profit so ready to make another step instead of regret about past.
If you are in doubt about other coin then just buy bitcoin now and don't sell until you achieved your target. This time is not suitable for selling but if someone is in huge profit and he cannot hold longer then selling should be preferred. Understand the market and accept your profit but I think if someone is selling their bitcoin without waiting more so he will miss the opportunity of having huge profit in Bull season.
regrets after selling Bitcoin mostly happens because no one can perfectly predict the coin market.
Prices move up and down it's just based on supply demand and sentiment.if after buying,the price goes down immediately just wait untill it's goes up if you are not urgently in need of money at the time,you just can't predict this things.but it's always save to buy coins when the prices drop .
You sound like a trader, which coin are you even talking about and you also encourage buying at the dip and selling when the price increase, waiting for the price of Bitcoin to drop before you can accumulate is not a good strategy expecially for new investors.
Also with the DCA strategy you will not be waiting for the price of get dip before accumulating since you will be accumulating either every weeks or months irrespective of the price of Bitcoin and HODL for 4-10 and above.
We only have to think that by buying Bitcoin, we can achieve more success in the future. For this, we only have to think about buying Bitcoin, because we have to hold on to Bitcoin investment for a long time, thinking about how we will collect money and use that money to follow the DCA method weekly.
We will never think about selling Bitcoin investment, because of course, our biggest thing is to keep the DCA strategy in place and give maximum attention to Bitcoin investment. And of course, we need emergency funds and prudent income to recover from danger.
It is not only by buying Bitcoin will determine your success as a long term investor but by also having drastic preventive measures put in place that will ensure the safety and protection of your bitcoin portfolio also matters. Buying Bitcoin is very important and also protecting your bitcoin stashes from unplanned Emergency situation that may likely happens in the future is also important. Putting your plans into action by building a strong Emergency funds and reserve funds to lookout for your Bitcoin investment will prevent you from been tempted to tamper with your bitcoin portfolio when Real life Emergencies struck.