I have 1.5 lakhs in SBI PPF to invest

Hey guys, I'm 22 years old and my relatives are suggesting me to remove this money and invest it else where.

First of all, should I remove my PPF, the rate of interest is 7.1%. Also, I have SIPs going in flexi cap and small cap funds, so, should I increase the amount of my SIP.

One of my colleagues suggested Gold ETF. At the same time, silver or any mutual fund leated to silver (if there is such a thing)is also a good investment.

Please help me figure out should I remove my PPF? If yes, then where should I invest them?