Worth Upgrade BH SPIKE 2.5

Hi,

Is it worth upgrading this frame or should I change the bike?

I would like to upgrade:

• The fork to Rockshox Reba solo air (The current one sucks)
• Rear derailleur and casette to an XT (I had a crash and it was bent)
• Tyres

I’m barely new in MTB and I would like to improve the bike

Many thanks for your advice!

Link to the bike: https://www.bhbikes.com/es_ES/ofertas/bicicletas/montana/sport/spike-2-5-a2592