It is very realistic in the future, inasmuch as the adoption is still increasing, especially if more institutional investors starts to get in including governments, there is nothing stopping Bitcoin to surpass $1m. The timeframe of reaching $833k is what we don't know for sure, it can be more or less of 10 years but Bitcoin potentials proof that it can happen. If you believe in the potentials of Bitcoin to reach that height in the future then prime time is still open to buy and stuff your bag now before that time. Between now and then when price will hit $800k and above, today will be like the early days of Bitcoin playing out all over again, so buy now and become very rich in the future.