welcome to ft udan_khatola....if you won't be doing too much travel then i don't think platinum is worth it for you....a few great perks of platinum are:

non-expiry of miles....this is a great feature for someone who travels a lot & is saving up miles....

upgrade to business from cheapest economy fare....another great feature as upgrades vouchers are only valid on a higher economy fare but for plats even the cheapest fare would be valid....

5 upgrade vouchers....enough for a one way upgrade between north america - india....

i have received a few free upgrade due to my plat status & once got an upgrade from business to first....but these are not published benefits & are rare....