Reducing volatility of coins in tumbled wallets

I have some tumbled coins that I want to spend in the future but cant spend/buy at the moment. I bought them when btc was ~$300/coin and I am looking for some way to maintain their cash value now that coin is >$1000 per. Leftovers from purchases etc.

The coins were purchased through Circle/Coinbase/BTCe., sent through a tumbler, and are now sitting in a wallet that has been used with DNMs. How can I get these coins in a non-volatile state and fix their current cash value? I imagine sending them back through a tumbler then into a btc buyer/seller would be a big no-no.


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