people who bought Bitcoin at two digit level are the luckiest one not the one who bought for $3000 but they can be called as wise as a strong believer of Bitcoin so you also can buy even now and wait for the prices to increase $50,000 or $100,000 in the next few years don't expect the prices to to be falling again because it never happened.
That would be a "successfully" done trade if you are going to book the profit and not play with your money any more. But generally people buyback that is they sell and then use the fiat to buy at a lower price so they have a multiplied amount now than that they had before selling. They follow the cycle and sell again at the top. This is called recycling and thats how trades continue to make money from a certain capital.
What the OP has done is promoted a trading site in their opening post. Rest of the discussion is just sidetalk.