Can I ask a technical question?

Sure

Just sent cro from coinbase to metamask wallet (cronos main net) no success.

Transaction shows as successful on coinbase but no Transaction appeared on scanner.

I don’t use Coinbase but I was under the impression it supports ERC-20 only?

So is my $$ gone then? Or will it revert back?

So cro should be in eth wallet then? How can I get it to Cro main net?

Using the Cronos bridge

So coinbase cro is erc-20?

As far as I know, yes

To transfer any asset between networks, you have to use a bridge — Alternatively, you can also just send your CRO to your Cryptocom Wallet, and then withdraw to an external wallet using CRONOS chain

Ye

Bridge is one way Sending to CDC main app or exchange over ERC-20 then withdrawing over Cronos is another way

What's the cheapest way?

Cheapest is to never use ERC-20

Do you have a CDC account? Of yes just buy some CRO then send them via Bridge to your metamask (must select cronos chain and not erc20)

Unfortunately got Cro erc 20 in metamask, need to get it to cronos main net.

Those are different chains. Cronos works with cronos mainnet and not erc20. You should bridge them to have the CRO (cronos mainnet)

So Bridge erc20 to Cro mainnet.

Is it a question?

Here is some information. Have a read of what is supported and what isn't. https://cronos.crypto.org/docs/bridge/webapp.html#transfer-assets-from-crypto-org-chain-using-cronos-bridge-web-app Select bridge and choose what fits you're need.