While flexing on a given profit may seem unrealistic, it is indeed possible to reach those numbers BUT it requires tons of experience, luck, and capital in order to achieve this. I agree with you- people who brag about earning $100k+ profits can be very deceiving especially if you consider the overall factors. Unfortunately, those people aim for clickbait titles in order to garner views which they may capitalize on.
Again, cryptocurrencies are "investments" which means that there is no easy way to profit. If there exists such a way, then everyone would have been rich by now.
Investing in crypto is indeed not an easy way to get rich, there will be many processes that will be passed as well as some risks that will get in the way. Those who want to make a profit of $100k with a capital of $1000 are just bragging. It's not impossible, but it takes time and in-depth knowledge of trading and investing. Not as easy as turning the palm of the hand. Must be more realistic