Helius CEO Mert Mumtaz has made a bold pledge to shave his head with a pencil sharpener for a month if Solana (SOL) does not surpass XRP in market capitalization. Despite a recent 15.4% decline in SOL's value, Mumtaz remains optimistic about Solana's long-term prospects. Currently, XRP holds a market cap of $133 billion, and for Solana to overtake it, a 54% price increase to $240.3 is necessary. This is not the first time Mumtaz has shown confidence in a cryptocurrency surpassing XRP, having previously expressed similar sentiments about Zcash (ZEC).