As it's said, "Patience is a virtue". We as "hodlers" of Bitcoin should be patient in order to see better results in the future. But, what if Bitcoin never reaches a new ATH? Then, I'm afraid that most people "hodling" Bitcoin will lose all of their investment in the long run.
What are your thoughts?

Very unlikely. I don't think the current ATH is crazy or unreachable. BTC has at least twice reached almost $14K this year, which is about 70% of the ATH. I expect the next halving to fuel the major rally breaking new ATH in the coming years. But even if the worst happens, people should know that investing in crypto is very risky.
BTC already proves itself for how many times. I do agree with you that it shows us how it is easy to achieved $14k, new ATH will be a piece of cake, maybe not today or right after the halving, it may take more months but at least, new ATH will come for sure.
Yes there is no doubt that bitcoin has huge potential to gain high level demand with time so as according to previous record I am sure this time again bitcoin will give us pleasant change in price that almost all investors will appreciate and will support bitcoin for being the most reliable coin, i hope new ATH will come soon.