Contract

Exhibit 6.3

Austin Homes LLC Xxxx Xxxxxxx, Manager 000 Xxxxxxxx Xxxxxx Xxxxxxxxx, Xxxxx 00000 208 - 707 - 1008 xxx000@xxxxx.xxx Sub - Lease 000 Xxxxxxxx Xxxxxx Xxxxxx0xxx0,0000 Sublessor: Austin Homes LLC Sublessee: XTRA Bitcoin Inc - CBTC Parties agree that XTRA Bitcoin Inc - CBTC hereby subleases shared office space at 000 Xxxxxxxx Xxxxxx under Xxxxxx Xxxxxx LLC's Lease (Master Lease) dated September 1, 2020, with Quail Cove Townhornes (a OBA of The Pines Townhomes LLC) as expressly allowed under the terms of the Lease. Term: Month to month Rate: $250.00 per month Parties agree that all other terms of this Sub - Lease are the terms of the Master Lease. Agreed to by: X x . . t Xxxx Xxxx n - CEO XTRA Bitcoin Inc - CBTC xxxx@xtra bi xxxxx.xxx Xxxx Xxx son - Manager Austin Homes LLC 208 - 707 - 1008 xxx00x@xxxxx.xxx