It all depends on how you define a win, and how well your strategy performs.
It is nearly impossible to become wealthy investing $1000 in a DOW company or spending $1000 on a bitcoin miner. You might make a little eventually, or you may lose your ass, or you may break even in a year. This does not mean that there are not people who have developed strategies in those spaces who actually will become wealthy. It just means that it is very likely that you will not be one of them.
You need an edge. You need information most people do not have, or an innovative way to use the information that is widely available. Like counting cards, you can turn the odds against the house. You can play Blackjack all day along with the thousands of other casual gamblers and you will probably experience the same result that they do: The house will take most if not all of your money. Unless you have the edge.
It sounds so appealing: Buy a magic box that spits out $20.00 bills all day and all night. Seriously? That is a sheep strategy, and you will be fleeced. If it were that simple we would all be sipping Margaritas on our yachts with topless supermodels rubbing our feet. You need to be smarter than everyone else to get the yacht, there are just not enough of them to go around for everyone.
Guys who got into cryptos early essentially had information few others had access to. They got paid well for having that information. Everyone is focusing on difficulty and ROI. Find a way to focus on something no one else is paying attention to and the BTC will come rolling in. If you cannot find an edge, mining is a game you should not be playing. Don't get involved until you find one.
I agree with you to a certain extent, but you're missing a major point. A rising tide lifts all boats.
I have to think that most folks who were invested in bitcoin for at least a year are doing pretty well now since the price went from ~$20 to over $800. It's hard to lose money in that type of environment!
If Bitcoin truly goes mainstream within the next year or two, many mistakes will be forgiven and most folks who are invested now will be happy...