I'm trying to find out if I invested in bitcoin years ago, how can I find my bitcoin? For whatever reason I remember investing in bitcoin when it first got started, unfortunately I don't have my old computer or old files anymore. If there is anything you could do to help that would be wonderful. Thank and have a great day.
If you purchased bitcoin in the past, there are likely only two ways you were storing it.

First, you may have been storing it on some web wallet, where the keys to use the bitcoin are managed for you.  If this is the case, you will likely have registered for the wallet with an email address.  If you think you know which email address this was, and you still have access to it, I recommend searching through your email history.  If the wallet company still exists (and hasn't lost/stolen your money), and you can prove your identity to them, then they could give you access to your bitcoin.

Second, you could have stored the bitcoin in your own wallet.  If this is the case, and you truly don't have your wallet file...you are out of luck.  You probably bought this bitcoin from some company, and again registered with an email, so it doesn't hurt to search for a record of your purchase.  However, if you took on the responsibility of holding onto your keys yourself, and you failed to do so, there is no way to retrieve your money.