Marcin Kierwiński said regulating cryptocurrencies was a matter of national security, citing their use in funding illegal migration.
"We certainly won't stop trying to regulate the cryptocurrency market, because it's simply extremely dangerous," Kierwiński told private broadcaster RMF FM radio on Friday.
The Polish interior minister suggested right-wing political groups with investments in cryptocurrencies were influencing the president's decision.
President Nawrocki vetoed the bill on Thursday, saying it was nearly identical to earlier legislation he had rejected.
He argued it contained "fundamental flaws" and only one "minor amendment".
The proposed law would have implemented EU regulations on crypto-assets (MiCA) and given Poland's financial regulator KNF powers to suspend public offerings, impose fines of up to PLN 10 million zloty (EUR 2.37 million) and maintain a register of fraudulent websites.
The bill would have also introduced a maximum supervisory fee of 0.1 percent on crypto-asset issuers, down from the government's original proposal of 0.5 percent.
Prime Minister Donald Tusk previously told parliament that unregulated cryptocurrency markets were being used by Belarusian services to fund illegal migration into Poland.
(ał)
Source: PAP