If it's a replica, then it's only gold-plated at best, and it's only worth as much as someone is willing to pay (which won't be much).
There is only ONE U.S. 1849 Twenty Dollar (Double Eagle) gold coin. It's a national treasure that is in the Smithsonian collection. The coin is priceless.
$10.00 (US) + shipping
Only one genuine 1849 $20 gold piece is known, and it was designed by James Barton Longacre, not George T. Morgan. Any other supposed $20 gold piece with that date is either a fantasy coin, a replica, or an outright fake.
No coin replica or copy has any numismatic value at all. Most collectors and coin dealers don't even bother with them. Try a web search for an idea of value,
The only real one is more than 7 million dollars, a replica is about 5 dollars
The standard weight is 33.4 gm for an unworn $20 coin issued from 1849 to 1932.
1848. Silver. Twenty. Dollar. Coin
If you mean a replica of a 1933 $20 gold coin? it's only worth what you can get.
A US twenty dollar coin replica typically has no monetary value as it is not an official US Mint issued coin. The value would depend on factors such as the materials used, craftsmanship, and collectability among numismatists or coin collectors.
Since it is a replica, it has absolutely no collector value. However, depending on what material the coin is made of it might have value for scrap. If the coin was made of 90% pure gold like the original, it would be worth ~1600. If such a coin was made in 90% silver, it would be worth ~$20. However, chances are your coin is made out of gold plated copper, nickel, or some other near-worthless metal and is only worth a couple of cents.
The hole kills the collectible value of the coin. It's likely only worth about $25.00 for the silver content of the coin. Take it to a coin dealer for an assessment and value.
200,000