Currency very old

Japanese old currency was made model of kamon,too. Okay,first is popular it.Do you know whose mon is this ?
 
This is 六文銭(roku-mon-sen).真田幸村(Yukimura Sanada)'s family symbol.He is so famous.He is taken as game or comic hero in Japan.

Japanese old currency must be pierced.I think this hall was strung by cord instead of wallet.

And let's see some arrangement pattern.'裏浪銭紋'(ura-nami-sen-mon) is mixed wave.And pierced too.(^^)

This pattern is '六ツ念銭紋'(mutu-nen-sen-mon).'念' means 'to pray silently'.These currency represent wish.

I don't know why currency was used as kamon design.They might be banker,generate currency,or rend money.