I still need to get a GCash card at Globe Store. Please correct me if I am wrong 
Yup, You need to have a Globe sim first then dial *143# and choose Gcash it should be at number 8 then register your sim. After registering your sim you can now the go through any Globe outlet that's near you bring a valid id and 150php.
With Globe Gcash you can even put money directly into your bank account. BPI and RCBC only. From Bitcoin or any Crypto that is accepted by Coins.ph then transfer to Gcash then deposit directly to your bank account.
hindi na po kailangan mag register muna sa *143# bago magpunta sa globe store/outlet, pwede na mag direct dun sa globe store para makapag register sa Gcash. ganun po sakin at sa kapatid ko.
Well, we have different procedure on how to register with GCASH.
Here's what I did, I downloaded the app, input my information, of course with my globe sim no. and get verified, the good thing with Gcash is you can get verified online, and that's full verification and you don't have to wait for hours to know if you pass, it's instant in my case.
Also, with regards to the card, you can apply online if you don't want to go to their office, as long as you are fully verified, you can just pay the 150 php through your GCASH and wait until the card will be delivered, according to them, we should received it at least 10 days from the date we pay.
I have a tip for you to get a better rate in BTC exchange.
Make a paypal account and trade your BTC with paypal, then transfer your paypal to Gcash wallet, it's also instant.
When it comes to cash out, If you don't have a GCASH card yet, you can transfer your GCASH to your bank account/s, and that is also instant.