Hmmm, it is a difficult question, but I think you may have answered it yourself when you indicated the number of vouchers you have.

You don’t have enough to use for a card, so maybe selling for DEC will make them useful, at the least you could exchange the DEC for SPS and stake it to compound, but I am sure you have plenty of ideas to grow that value with knowledge of the Hive game ecosystem you have.

Another aspect is, how quickly can you accumulate?, with 80 days ir so to the next card, will you accumulate enough to use ?, if not then thats another readon to sell and realise value that you can grow.