This seems like an optimistic interpretation of things.
Portugal's golden visa can be gotten with a 500K€ investment in the country. That's true and the amount is an EU rule somewhere, as some countries were selling their passport for cheaper and pressure has been applied on them to increase the price.
As the article says real estate investments were allowed, and this coupled with tax free residency for 10 years for retirees has meant thousands of people going to Portugal and buying flats and houses for 10 times their previous prices, screwing local people royally, so now that's no longer an option.
Apparently some financial investments could be eligible and from there the boss of a Bitcoin fund claims you can invest into his fund and get residency but that's a big stretch.
See
https://coinmarketcap.com/community/articles/66a11dd5e4405e7236f83e0f/On Twitter he says that "You are 'indirectly holding' bitcoin"
...At first, I assumed that you cannot put bitcoin directly into this fund. Basically, you just give them 500K in cash and they invest in in bitcoin ETFs.
However, on the fund page they say:
"Turning your digital assets to a key for mobility", so it sounds like the opposite
So, it is less clear and more info is needed.
I found that they have 10% performance fee and 2% management fee (this probably means 10% off of appreciation and 2% "management', similar to what GBTC has [1.5%]).
Seem like a bit bullshit...
1) There is no way they can promise the return they are saying
2) They will MOST probably convert your BTC somehow
3) Golden visa or not (for not EU citizen), you have to live minimum 5 years in Portugal as main residency (and more than 183days a year) AND you have to pass official portuguese language test to qualify too.
You are exactly right about 5 years before citizenship (plus a language test).
That said, the site says that you need to be in Portugal only 14 days every 2 years.
Basically, a one week vacation per year.