Ideal prompt to show to the customer I am selling SASS solution on my website.

How do I ideally educate customer to use bitcoin, which convince them 
to use bitcoin instead of paypal or other methods.
Do you offer both Bitcoin and PayPal/other on your website? If so, offer them some discount, say 10% off, if they use Bitcoin. Tell them that it is due to lower processing fees. With some monetary incentive, you will convert some of your customers over.

If you offer only Bitcoin, put some link in a visible page stating something like "why only Bitcoin?", then bring them to a page in your FAQ where you explain your reasoning to use Bitcoin - lower development cost, lower processing cost, no charge-backs, freedom from third party companies, etc. etc.

Be sure to link to some accessable material for newcomers - for example, We Use Coins, or some materials from Bitcoin Wiki on Introduction.