How much is $100 USD?

Could you please elaborate on the current value of $100 USD in the context of cryptocurrency and finance? Specifically, I'm interested in understanding how this amount translates into various digital currencies, such as Bitcoin, Ethereum, or even stablecoins. Furthermore, I'd like to know if there are any significant fluctuations in the value of this amount over a period of time, say a month or a year. Is it advisable to invest this amount in cryptocurrency given the current market conditions? Your insight would be greatly appreciated.