Final answer:
The future worth of the coin collection would depend on the silver prices and numismatic value in 2048, which needs more information to calculate accurately.
Step-by-step explanation:
The worth of your coin collection in 2048 would heavily depend on the silver prices at that time and the numismatic value (or collector’s value) of the coins, which wasn't provided in the question. Let's assume that the face value of each silver dollar was $1 when your grandparents purchased them, and the silver price remains the same as today. Multiplying the number of coins by their face value gives you the original investment ($801,952). However, we can't calculate the worth in 2048 because we're missing inflation rate and future value of silver.
Learn more about Coin Collection