I don't think its accurate since 2021 isn't over yet. However in 2020, bitcoin did crash to almost $3K. I think the low was like $4K on Coinbase but $3.5K on some futures and derivative exchanges.
However you need to realise that it can't go up forever, sure it can have a low of $30,000 however most likely even in 5 years or so, I don't think it having a low of $300,000 is sustainable. Maybe it might peak one of these years somewhere in the 6 figures however with the amount of people holding bitcoin, I don't think its possible to trade sideways in the $500,000-$1,000,000 price for a long time. Going to be too much sell pressure.
Many people already know about crypto now. So say some old adopter want to sell 1 BTC, currently its $45000. Usually retail will buy maybe 5-10% of that. So 10-20 new retail people will pay for 1 BTC that someone is selling.
However if price is $450,000, then it means for 1 person holding 1 BTC and wanting to sell, there would need to be 100-200 new retail people who are going to absorb all that selling pressure. I don't think its sustainable.
for now or this year the value of 1 btc at a price of $ 45,000 looks very large because we measure the price of $ 1 with the current currency value. in 2024 the value of 1 btc for $ 45,000 is very low, because the value of the currency is falling every day or in other terms inflation occurs in a country. so for 1 btc for $450,000 based on my prediction it's reasonable and not crazy.