Their technical report, which is currently undergoing peer review, suggests that millions of dollars in ether may be at risk from poorly coded smart contracts that contain a variety of bugs.
https://news.bitcoin.com/bad-code-has-lost-500-million-of-cryptocurrency-in-under-a-year/“finding contracts that either lock funds indefinitely, leak them carelessly to arbitrary users, or can be killed by anyone”.
The most notorious case was the Parity bug which led to $168 million of ether being rendered permanently inaccessible.
If we think in a given time all that we have holds of many token that have bad code was appear on this issues?What should we do