Rhodium: Used in catalytic converters, rhodium is extremely unusual and pricey, attractive primarily to industrial users as an alternative to retail buyers. Volatility and speculation. Costs of metals like silver and platinum is often extremely volatile, motivated by industrial demand from customers and speculative investing. It's a fairly liquid investment: https://rowanyfjwf.jaiblogs.com/64207340/the-best-side-of-retirement-asset-stability