The government has the power over many things under the country according to the law whether you will fight it out as a case or not. But seizing the bitcoin may be a little difficult because until they gain access to the wallet of the company, asides that it may probably be hacked be through the internet if you refuse to tender the wallet security code.
Accessing it literally is impossible because only the company would really have the only access since it is the only one who do possess its keys but if government do decide on legal manner then
they might really have the chance or would really put you up into a hard situation but the only thing that i cant think of is anything that do violates in terms of tax then thats one hell of a problem
which can really possibly giving you no choice but if theres nothing wrong then government cant do anything with those reserve.Company does have the rights on how and where they would
convert out their cash.If something or violation had been committed then you would really be put up on a hard situation.