There aren't many VPN which simultaneously offer decent privacy and high speed for streaming.
Yeah I know, it's much harder than it looks, to find something that ticks both of those boxes. Before settling with ExpressVPN few years ago I tried few other that were supposed to be very good (like NordVPN and ProtonVPN) but all of them had some issues when it comes to streaming services. Either it was speed, Netflix reliability (NordVPN) or low amount of servers that work with Netflix (ProtonVPN) or not working with Amazon at all.
AFAIK only ProtonVPN offer both. I only used free version though with slow home internet connection, so i don't know if it can handle 4K streaming.
I am looking at their website now and it seems that they improved a lot compared to the last time I checked (iirc it was 2019). I see that they have wider selection of servers now and since 1 month of their "Plus" package costs only $10 I will definitely give it a go.
I think that Mullvad is the best VPN you can buy anonymously with cryptocurrencies, but they are certainly not the cheapest available option.
I will give it a go if ProtonVPN turns out not to be good for my needs, and it seems like its even cheaper than the one I am using at the moment.
You can also try Windscribe or Proton free versions but for anything serious you will need to pay pro version.
Not really interested in free versionsas from my experience free VPN versions are good for only the most basic browsing purposes and nothing else and |I have no issues paying something 5-10 USD per month if it means it will work hassle free and without any restrictions.