If the US dollar crashes is it smart to have junk pre 1964 silver dimes (90% sliver) worth $1 each currently?

My basic concern is that if the dollar crashes and we go to a trading system temporarily, how would the lay person know the value of silver if technology shuts down do to the crash? Would it be a smart investment? thanks for your help

How Much is a Washington 1964 Silver Quarter Value Worth in Dollars?

The US Washington 1964  Silver Quarter coin was minted before 1965. The 1964 Silver Quarter coin, Roosevelt dime coin, Kennedy half coin and Peace Dollar coin, all these coins contain 90% silver. Yet, sadly the Peace dollar does not exist any more because they were sent back for melt down before they hit the streets. […]