Can google ads promote cryptocurrency coin trust products & services?

Could you elaborate on whether or not Google Ads allows for the promotion of cryptocurrency coin trust products and services? Is there a specific policy in place that governs the advertising of such offerings? Are there any restrictions or guidelines that advertisers need to be aware of when promoting these types of products and services on Google's advertising platform? I'm interested in understanding the scope and limitations of what can be advertised related to cryptocurrency coin trust products and services on Google Ads.