We cannot completely say Bulgaria owns the largest BTC. However Bulgaria is one of the countries along India, China, USA, Nigeria etc. who has a good number of its citizens owns BTC.
From all occurrences there is no better time to buy Bitcoin but for last year. The price of Bitcoin fell to a lowest of $17,000 Just spot you own minimal and buy as many as you can afford. You can start accumulating gradually which is one way a lot of persons here in this community did. However this year 2024 will pose another opportunity which you can profit from but remember ETF approval is at the corner, Halving Event is forth coming. This serve as opprtunity for BTC to go high.
Be watchful.