Currency changes when navigating the site

Hello,

I’m noticing that when selecting one currency for a product, for example Bahraini Dinars, and then navigating the site to another page, the currency defaults back to USD.

Is there any way that while the same user still navigates the site, the currency he selected remains the same, and not default back to USD (which is the currency I selected the store to default to)?

Please advise.