Bitcoin is likely pretty close to inevitably going to continue to be volatile in the next 30 years, but surely if bitcoin's market cap continues to increase it will likely become less volatile with the passage of time.. but as you seem to hint 30 years is a long way to project out, so it does not have very much to do with the topic of this thread except maybe to the extent that your buying BTC (and even loading up on BTC) right now will give you a lot more options 20-30-40 years into the future, so maybe even slow accumulation now and in the next 4-10 years will then result in such BTC accumulating person to have a lot more options when it comes to 30 years down the road.. so long as s/he had not ended up losing the BTC along the way.. so one thing is accumulating BTC but another thing is actually making sure taht they are secure and periodically checking security and keeping up with the better ways to hold your BTC... whether that is going to change or not in the next 30 years seems to also be something that is hard to predict but seems likely since we are ONLY 14 years into bitcoin, as you mentioned.
The pressing question is how an individual with an average income can afford to acquire a meaningful amount of Bitcoin, especially when its price potentially reaches $250,000 within the next five to seven years. Hence, current lower prices present a valuable opportunity to accumulate Bitcoin before it becomes less attainable.
Alright, man. It's quite simple. With $2000 in your bag, what you can purchase with that amount now will be higher than what you can purchase with it in the next five to seven years. Since the percentage of inflation gradually increases almost every year, it's more likely for you to increase your annual earning capacity. This way, you can slowly accumulate some amount of Bitcoin within 5 to 7 years, even if the price reaches $250k, using the Dollar-Cost Averaging approach.
I remember when people regretted not buying Bitcoin when the price was lower in 2014. But regardless, a lot of people are still buying now and holding, and even average individuals are investing in Bitcoin.
Even if Bitcoin becomes $250k it will still be affordable to those who know how to place their tenth around bits instead of focusing on the whole 1 unit worth of Bitcoin at once which at that point may be seen to be too expensive to achieve at once, the awareness of this approach of accumulating in bits when the price of Bitcoin become overly expensive with trillions in market cap, it will not eradicate the DCA approach and at that point, small bitcoin investors/accumulators are only left with the choice to bounce back on bits as the main mechanism to accumulate bitcoin at that point.