Do we have a purpose on this planet?

My mum was 13 years old when my grandfather decided to migrate to China after making his fortune. They live in Indonesia. My mums grandmother was a very rich lady who dine in gold plates. She owned land and plantations. The year was 1944 when my grandfather decided to head back to China. They landed in Singapore and heard the Japanese was at war with China. They stayed in Singapore for awhile. As the war rages on my Grandfather,Grandmother and my mum along with 3 younger siblings headed to Malaysia and ended up in a little fishing village called Pontian. There my Grandfather set up a business.
Not long after ,the Japanese was heading into Malaysia and quickly sweeping across the country heading towards Singapore. My Grandparents and my mum and siblings headed into the jungle and head up towards the highest point. Upon reaching the top of the mountain there were 3 families hiding there already. An elderly lady greeted my grandmother
and told my grandmother that they cannot stay there with them as my youngest uncle was only a baby ( 6months old) and he might cry and attract the Japanese attention.

Sad and disappointed my grandparents headed back downhill and put up the night amongst the thick bushland. Amazingly my youngest uncle did not cry that night.
Came dawn my Grandparents took mum and her siblings and headed up to where they were when they met the elderly lady. Shockingly all the 3 families that stayed the night there were all gunned down in cold blooded massacre!

They survived the war and lost everything....but life is worth much more in gold!

At times I wonder why my families are so lucky to escape such atrocious act of inhumane , unnecessary murder of defenceless families. I question why on many occasions and the reason they survive. Whats the purpose? Is there one for me to fulfilled? I have search and wonder...and done alot of soul searching!
Everyday I thank the heavens I am alive!