Two persons can invest in Bitcoin at the same time, and one will lose money whereas the other will earn profit. Results totally depends on your approach or what you do afterwards. You don't expect to be rich or make fortune from BTC just buying today and selling tomorrow, it definitely will take you some years and some patients to achieve such result. Bitcoin only rewards those with the right investment approach or mindset.
You make a very good point, approach is the best thing you can offer to yourself when buying and accumulating bitcoin it also determines how successful youre going to become, your approach solemnly depends on how long you decide to buy bitcoin and hold, someone that is buying for the long term and he is considering 1 or 2 circles would have an advantage of having a successful investment, while someone who is only interested in a short term profits would definitely have more chance of failing when buying bitcoin, I dont believe rich people have the tendency of failing while investing in bitcoin and holding, the same thing is also applicable to poor people, it all depends on your approach when buying bitcoin, buying for the long term gives more guarantees than short term Bitcoin investment.
