They are all charms, I believe. Number 7 is the most "coin-like", and the inscription on it, "Yong Chang tong bao" (Eternally flourishing currency coin) was used as an inscription on the coins of a late Ming Dynasty rebel emperor (AD 1644-1645). However, his coins are uncommon and usually found in much poorer condition than this, which leads me to conclude this is a "coin-like charm". Number 8 might also be a coin-like charm, though the reverse is too fuzzy to read.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis