Answer: The $500 bonus is a monetary reward that can be used to purchase goods or services. It could also be used to purchase cryptocurrency or other investments. Depending on the rules of the Crypto-news-carnival event, the bonus may be used to cover expenses associated with attending the event or to purchase tickets or other items related to the event. The bonus could also be used to purchase items related to cryptocurrency or other investments. Ultimately, it is up to the individual to decide how to best use the bonus.