Q. See question above. Dear Rov I heard that the reason is that it is a Segula for having Parnasa and good economic support in the marriage. Is that correct?
A. Indeed another reason for silver use by a wedding is that silver is a good siman (sign). In Hebrew (כסף) the numerical number increases with each letter (20, 60, 80). From Chukai Noshim Ben Ish Chai chapter 45.
By Gentiles (lehavdil), a common practice is the groom presenting the bride with an engraved silver teaspoon on their wedding day to symbolize that they will never go hungry and/or the practice of the new couple stepping over a broom into their new marriage.
The Chabad Rebbe in a Sicha said that the Minhagim (traditions) of the Nosi Hador (Leader of the Generation) are for everyone to follow especially the Minhagai Chasuno (wedding traditions) that are done in giluy. (in public).
Rabbi A. Bartfeld as revised by, Horav Yaakov Hirschman, Horav Dovid Pam, Horav Aharon Miller, Horav Chanoch Ehrentreu and Horav Kalman Ochs Shlit’a