It's been back for around 3 months now. Sometimes it's offline though. There also are other ways to access via a private link by a certain market but I don't want to give too much information on this or it stops working.
Just check https://daunt.link It's a new project by the same team and you can find important links there.
You shouldn't buy Monero if you think of it as investment. It's probably the only crypto currency that is actually used as a currency.