There are also services that will help you research the value of old stock certificates, often for a fee. (budgeting.thenest.com)
If you find yourself in possession of old stock certificates, you have a few options for selling them. (wikihow.com)
This means it is unclear whether historical analysis on the decades - old stock market is appropriate for the far more volatile cryptocurrency that's only 9 years old. (cryptonews.com)