When some of my holding increases 100% i exit 50% qty and make the remaining free.
I want to keep this balance qty forever. But the issue is, i keep getting it displayed under holdings. Due to this i some times cant get convicted enough and exit remaining qty.
can we have afeature to hide investment and park as do not sell it ? ?
i also tried to pledge it but some instruments are not eligible for pledging also.
pl suggest.
Transfer it to a demat account in a different broker
You may want to consider freezing the stocks so that they are not displayed on the trading platform.
The procedure to freeze & unfreeze stocks at Zerodha can be checked here: How to freeze or unfreeze the stocks in the demat account?
Zerodha is working on giving clients an option to opt for a second demat account 
this can solve this issue but again it was said “soon” without an ETA so yeah for now other options seems viable.
Just taking cues from the comment above and your DP, and making an educated guess -
Kite > Holdings > Three Dot Options > Send as a Gift. (To Children)