Personally, I think these kinds of topics are pretty pointless because they call for some kind of wake-up call in the sense of "invest today to be rich in x years" - but the OP forgets that the price of BTC today is not $100 or $1000 and few people can afford to invest that much to get rich even if the price one day reaches $1 million.
Of course, I'm not saying that it's bad to invest in something you believe in, but you should be realistic and not get carried away with ideas that BTC will increase its value by x50 or x100 in the next 5 or 10 years. Only a small part of investors today invest in BTC, so even though we are constantly bombarded with news that this or that company is investing in BTC, it is still quite small to convince people that Bitcoin is better than stocks, gold or real estate.
You made good points here, bitcoin is a coin that is valuable and have been making news so it's not a wake up call anymore, those who have the zeal to invest will invest while those who procrastinates will keep on procrastinating and those who ain't buying will still remain adamant as no level of persuasion will make them change their mind. Bitcoin is very costly and the masses are poor so i wonder why we should keep on telling people they will become rich in bitcoins when they could only afford investing very little within their level of discretion.
I think the only advice that will sound realistic will be to tell people to buy bitcoin and secure it from inflation in the future instead of emphasizing on how bitcoin will make them rich because if they invest with that kind of mentality and didn't see the wealth they were told about that bitcoin will grant them, it will become a problem. Except for someone who have already gotten a huge amount of bitcoin in his portfolio earlier before now when the price was much cheaper that can think of bitcoin making them rich since they have already stacked enough of it.