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If you are buying for last 10 years then you are not only buying at ATH but also at low price. ATH changes with time, like in 2017 ATH was 20k which today looks like an ordinary price. Today price is at it's peak of 115k and may be after few years from today 115k also looks to us an ordinary price. One advantage of keep buying for 10 years is that we don't need to worry about the bottom. Ten years averages the top, middle and bottom prices to give a good figure.
Over the past 10 years, anyone familiar with Bitcoin and closely monitoring it when buying has seen several ATH reversals, which generally occur every four years, such as in 2017, 2021, and this year, with a peak of over $122,000, not $115,000 as you claim. And for those who have been consistently buying Bitcoin since 2015 until this year, they have undoubtedly felt the immense success of their actions, driven by incredible confidence over the past ten years. So, these people have seen and experienced such a significant price difference that they no longer expect Bitcoin to return to its former lows, despite the constant volatility. However, as we've seen, the price continues to rise, and now the price of Bitcoin has surpassed $117,000 again in the market.