Here a post I made just the other day regarding this:
Depends on what your long-term goal is for these coins/collectibles.
I prefer my coins graded/slabbed to give them more protection and know that they have been authenticated.
ANACS no longer grades physical cryptos. They stopped in about 2019.
NGC is currently grading physical cryptos, but seems very limited to only Casascius coins at the moment
PCGS is currently grading physical cryptos, but only way to submit is to mail-in to them or drop off in person at a coin show
ICG is currently grading physical cryptos, they DO allow walk-in service if you call ahead and set it up with them.
Cost can vary from $25 up to $150+ depending on the service tier/turn-around time and then also the value of said crypto collectible.
Due to the value of certain collectibles like Casascius and similar, I would no longer recommend shipping these items.
Insurance will not cover the value of the digital load of loaded collectibles. This is similar to shipping a gift-card.