From linked article:
During my multi-country travel I learned that there are several regional companies that sell debit cards with pre-loaded amounts of cryptocurrency on them. Allegedly two of of the popular use-cases for these cards is: bribery and money laundering. The example I was provided was that it is logistically easier to move $1 million via a thin stack of debit cards than it is to carry and disperse bags of cash with.
The author doesn't seem to have a clear understanding of how crypto works. there's no need for a "stack of debit cards," thick or thin.