A more thorough explanation:

Definition: A high flier is a term used in finance to describe a security that has gained a lot of public attention and is being traded at a very high price.

One example of a high flier is Tesla, a company that produces electric cars. Tesla's stock price has skyrocketed in recent years due to the company's innovative technology and growing popularity.

Another example of a high flier is Bitcoin, a digital currency that has gained a lot of attention in recent years. Bitcoin's value has fluctuated greatly, but it has been traded at very high prices due to its popularity and potential for growth.

These examples illustrate how a security can become a high flier when it gains a lot of public attention and investors are willing to pay a premium price for it. This can be due to a variety of factors, such as innovative technology, growing popularity, or potential for future growth.