Nobody can make any adequate predictions that far into the future.
A couple of years in a Federal penitentiary.
Twenty dollars. $18.25 if you discount its purchasing power for inflation.
It is hard to say, but in average circulated condition, about $530,000.
no NO U.S. coins were ever made of pure silver. All had at least 10% copper in them. NO U.S. half dollar is worth a megabuck. Perhaps you are thinking of the famous 1804 silver dollar, which does sell for over that amount.
Not any longer. The government discontinued that practice about 45 years ago, when the price of silver was deregulated.
On average, a twenty dollar bill stays in circulation for about 7-8 years before it needs to be replaced due to wear and tear. This duration can vary depending on factors like usage and condition of the bill.
The mint numbers are so relatively large that the silver value will probably determine the price (40% silver). The 90% silver ones (1964) will be worth considerably more.
Silver
Nothing, none were made. Your coin is plated. It would be "cents-less" to make a penny out of silver because it would be worth more than a dollar.
Despite being more than 50 years old, 1957 is a common series for $1 silver certificates. On average, one is worth two to three dollars.
a silver jubilee
Silver