It would depend on when you asked. Six or seven years ago the answer would have been pretty clear here. Spending money on luxury is wasting money, hurts you, your health and burning extra fuel to get status harms the environment. Instead of dreaming of flying in First Class asked yourself why you fly at all when there is so much unchartered territory close to where you live.
These days it’s a matter of what it is worth to you and what is a priority. 1200 is a lot of money for something that is not guaranteed to be available when you wished it would be. Once you locked this in you also stop being creative about how else you could achieve your goal. First Class tickets can be had rather cheap in sales and with credit card signups. You don’t need status for this. You also might want to reflect on why you want to fly First Class or Business. The flight isn’t long, the space you get is something you wouldn’t often accept in a car, often, less in a train or hotel room. Every tent has more privacy than a First Class seat. Lounges aren’t offering something special you can get elsewhere cheaper. Being driven in a Mercedes to the aircraft isn’t really different from a taxi ride.
That doesn‘t mean that it is not worth it to you, but make sure it is worth to you because of what you get and not because of some fantasy.
Having said this, I do fly Business and First. It’s not a logical choice, it is certainly not an investment and I basically pretend it is a stress relief to deal with all the stress of unwanted business travel and as a treat for the occasional vacation.
things to think about:
Once you enjoy luxury it is harder to go back.
The optimum for travelling is two persons. Plenty of opportunities to get a deal, but you don‘t rely on many seat being made available or getting a non-standard room in a hotel that normally is not available on points.
Anything related to miles is gamble. Don’t gamble wih money you cannot afford to loose. I had close to 300,000 airberlin miles. Enough for several international business class round trips. Then the airline went bust after I booked flights.