Is the 51% attack the only technical reason no country will adopt Bitcoin as a state currency?

Let's suppose a country with a GDP size less than 300 Billion USD adopt the Bitcoin as an official currency. It will be very easy to crush or take control of state currency if a country like the US or China invests to run 51% of the mining pool.

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    $\begingroup$ Well, having to wait 30min+ for a transaction to be valid also isn't a nice feature... $\endgroup$ – SEJPM Oct 6 '19 at 10:41
  • $\begingroup$ @SEJPM another valid reason! $\endgroup$ – MBK Oct 6 '19 at 10:43
  • $\begingroup$ Bitcoin is not regulatable. Users are anonymous, and cross-border, laundry is trivially easy and difficult to trace, and value is highly unstable. $\endgroup$ – DannyNiu Oct 6 '19 at 11:11
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    $\begingroup$ I'm voting to close this question as off-topic because it's about economic implications and/or policy around Bitcoin, not the underlying crypto. $\endgroup$ – Maeher Oct 6 '19 at 11:42
  • $\begingroup$ the 51% is universal with blockchain. it might we worth riding this one out $\endgroup$ – b degnan Oct 6 '19 at 11:58