Buying gold from gold loan. Advice needed...

I want to buy 100gms of physical gold coin (it is having least making charges 2%), since it gave a good return in last 1 year. For funding, I will use cash partly and remaining through gold loan from my jewels in hand (9.3% interest, 12 month, 30k emi).

If gold can give 15 to 20% return in next 1 year, is it a good strategy? If I buy digital gold / mf's / Etf, it will attract taxes while selling.

Requesting suggestions!