Here are a few factors that can affect the value of a 1974 $100 bill:
* Condition: The condition of the bill is the most important factor in determining its value. A bill that is in excellent condition, with no tears, stains, or other damage, will be worth more than a bill that is in poor condition.
* Rarity: The rarity of the bill can also affect its value. Some 1974 $100 bills are more rare than others, and these bills can command a higher price.
* Serial number: The serial number of the bill can also affect its value. Some serial numbers are considered to be more desirable than others, and these bills can command a higher price.
If you have a 1974 $100 bill and are interested in finding out its value, you should consult with a professional coin dealer or appraiser. They will be able to assess the condition and rarity of the bill and give you an accurate estimate of its value.