Nice infographic.
Not sure about most countries around the world , but this is the latest info from HMRC for the UK.
https://www.gov.uk/government/publications/tax-on-cryptoassets/cryptoassets-for-individualsI believe it’s still rather a grey area , but the most important thing to remember is to keep as many records or info as you can. In the UK, the HMRC can retrospectively check your tax declarations and check many years into the future . They can do this when NEW legislation is passed by them and then go back and send you a bill!!