Do you think these statements hold any truth or is it just a trick to save votes?
You know the answer already brother and it's another publicity stunt to do the latter. A trick or not, a truth or not, politicians especially with the highest position in the USA will do everything to get people's trust from all of the different sectors that they have probably researched that has a lot of voters that shall be an opportunity for them to get into it and start talking and discussing topics that are in relation to it to set the rapport.In my honest opinion it's quite a stupid move by Biden's campaign especially given that much of his platform are either very indifferent towards crypto or even outright hate it due to environmental reasons.
It's been long overdue when he should have done that. But people do remember and it's easy to understand if these programs are for them or just another decoy to front for the voters to get their sentiments. Well, every election, the voters are becoming wiser and if the current administration didn't perform well, it's very likely that they are going to replace it with someone that their sentiments is with. It may not be perfect and flawless but they know something good is happening and it's going to be with their favor. 
