But if peradventure bitcoins reaches it's speculated ATH does it mean that one can possibly stop buying and holdling or continue because I feel that if Bitcoin should reach ATH then investors may no longer be interested in buying and holdling since the price wouldn't go any further higher again.
You can look at historical ATH levels and see that when the BTC price starts to get within 25% or so of the previous ATH, it will frequently shoot right past it, and sure there are always going to be sellers, but sometimes that BTC price does not end up coming back to those prices ever.. and if it does come back it might ONLY be for a short period of time and not really enduring... do you need some examples or do you want to look at the charts.
Actually, there is another phenomenon of so many dumbass newbies.. maybe like you, but perhaps you might even be dumber since the charts are even more extensive than they were previously, who are talking about selling at or near the previous ATH because of various reasons about how high of a price that will be and that they gotta get their money back and they can buy more when it dips and various dumbass reasons.. and maybe not even real people can really believe that stuff. but sure there are real people who are selling their coins right around the previous ATH.. and frequently losing a lot of money by selling too many coins too soon... and sure maybe this time is going to be different.. but I doubt it.. .. but you are are free to do dumb things and even say dumb things and hopefully not too many people are going to do anything similar to you but hey.. you never know.. maybe you are right, this time.. but if you are not, it might have had been good to prepare for either scenario, especially the scenario that the BTC price is likely to shoot past the previous ATH, even if there might be a few fake out corrections around that area.. perhaps? perhaps? But perhaps not, too.