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it can be a pump plan. these companies buy bitoin and then hordes of people follow them in bitcoin purchasing, then bitcoin price goes up. one year ago, I bought bitcoin in the wake of a company, then the price plunge then I sold it and lost money in dump. make judgement by your own knowledge(so you must learn to accumulate knowledge), not be driven by others
That is why I said it is subtle and legal type of pump and dump scheme. The problem with what you did is you followed what the public does, if a panic in the market is happening, you have to do the opposite, if everyone is selling, it means that the prices are going down and you can use that opportunity to buy more bitcoin at a lower price and if the other happens where many are buying, you sell yours because you will get a big profit.