There is power in speaking and praying in tongues. Speaking in tongues don't just happened without the indwelling of the Holy Spirit. It is activated and bring forth fruit with constant manifestation.

Speaking in tongues is speaking in the language of the spirit and it only take God to understand.

It brings strength to the weak.
Whenever a Christian that is Baptist in the Holy ghost is weak and couldn't pray, praying in tongues can help to activate the strength needed to carry on.

We are all qualified to speak in tongue as a Christian