x2 is a designation, common in the cryptocurrency community, for multiple growth, where the symbol "x" acts as a multiplication sign rather than a letter. The notation x2 is read as "twice" and describes a twofold increase in the value of an asset, the size of an investment, or profit relative to the starting point. By the same logic, the notations x3, x5, x10, and so on are used.
Most often this format is encountered when it comes to the return on an investment: saying that a position did x2 means that its value has doubled. The brevity of the notation makes it convenient for quickly discussing results on forums, in chats, and in analytical notes.
At the same time, it is important to keep a sober view: multipliers like x2 describe a potential or already achieved result, but they guarantee nothing. Multiple growth in price is always associated with the risk of an equally sharp decline, so such notations should not be perceived as a promise of income. It is merely a way to compactly express the scale of change, not a forecast and not a guarantee.
