A "bag" in cryptocurrency can be compared to a collection of items, such as a bag of marbles. Just like someone might collect different colored marbles, a cryptocurrency investor might collect different types of coins and tokens. Some investors might focus on acquiring a large number of a single type of cryptocurrency, while others might spread their investments across many different types, much like someone might choose to fill their bag with a variety of different colored marbles. Just as a bag of marbles can increase in value if its owner takes care of it and if the demand for marbles increases, a bag of cryptocurrency can also increase in value if the coins and tokens it contains appreciate in value. On the other hand, if the market conditions are unfavorable or if the owner mismanages their collection, the value of their bag of cryptocurrency could decrease, just as the value of a bag of marbles could decrease if it becomes damaged or if the demand for marbles decreases.

Bag holder: In the context of cryptocurrency, a bag holder is someone who is still holding onto a large amount of a particular cryptocurrency, even after its value has significantly decreased. This term is used to describe someone who has not sold their holdings and is still holding onto the "bag" of coins, hoping that its value will increase in the future.
Bag filling: Bag filling refers to the process of purchasing a large quantity of a particular cryptocurrency over time, usually at various price points, in order to accumulate a significant holding. The goal of bag filling is to average out the price of the cryptocurrency and potentially increase overall profits in the long run.
Bag dumping: Bag dumping refers to the act of selling a large quantity of a particular cryptocurrency, often in a coordinated manner, in order to drive down its price. This is often done by early investors or those with significant holdings, with the intention of causing a panic sell-off among other investors, allowing them to buy back in at a lower price and increase their profits.

A simple example of something similar to a crypto bag would be a stock portfolio. Just as a crypto bag represents a collection of different cryptocurrencies, a stock portfolio represents a collection of different stocks. Both a crypto bag and a stock portfolio can be bought and sold, managed, and diversified in order to maximize returns and minimize risk. Just as a bag holder is someone who holds onto a particular cryptocurrency, a stock portfolio holder is someone who holds onto a collection of stocks.