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The investment that people talk about in crypto and forex is the investment in the skill, which is something that if you take your time to invest to gain knowledge, you are profitable for life. With that reasoning, you should know that considering it a gamble should be off the table. There is a level of knowledge that, when acquired, will greatly increase your chances of being successful each time you trade. That is not the same for casino games where a gambler plays against the house, and regardless of the skill they possess, there is still a lot of room for chance and luck to play a role for them to be able to win the house.