Hi, Dave! Well, determining which privacy coin is the best really depends on what you're looking for in a cryptocurrency. That said, there are several privacy-focused altcoins that may catch your eye:

1. Monero (XMR) - Often considered to be one of the most private cryptocurrencies, Monero uses ring signatures and stealth addresses to keep transactions untraceable.

2. Zcash (ZEC) - Boasts being "the world's most secure cryptocurrency," disucssably through their controversial Merkle tree structure-and use of shielded addresses.

3. Grincoin (GRIN)- Based solely on intuition between two people without background checks or reliance: its encryption makes it completley anonymous.

Ultimately, selecting the "best" privacy coin comes down to your personal preferences and needs as well as paying close attention required nuances driving specific decision making.An important thing is facing on primary projects goals either technological innovation or affordability choices such... So make your hands dirty with investigating exactly what you want from a private cryptocurrency et find what coins address these concerns-or which can be used in conjunction with others Can provide strengthened layers or another option still...over!