You can grow your tbc when you will invest it in the right lending site or person that will really give your interest and you can buy and sell your tbc. Because without investing or selling your tbc. It will remain as it is.
LOL man, are you sure about that TBC? it's a complete scam and it's not even on the market cap nor there's an exchange that allows you to trade with it. It's a total crap and you can never grow your bitcoins by fooling people that this TBC will make you grow a lot. It's like you are going to pass the curse from other people in order for you to have profit.
I hope that she just misspelled btc to tbc but if not, Then you really need to do your homework dear. But people are actually earning in that tbc and yes it is be deceiving people who are new to cryptocurrencies. And its not a good thing because it will not help the whole community.
In growing bitcoin you must have a plan. You can buy and sell your bitcoin, you can lend it with interest to a trusted man, and you can invest your bitcoin to a business or any investing activity that can be profitable and can grow your invested bitcoin.
Its should be planned properly and you do need to have proper knowledge with it. Lending is a good way to grow your bitcoins but this is a risky thing but you can use escrow for it providing assurance that your borrowers will pay you in the right contract and terms that you agreed together. Trading will be always the most preferred way of growing it.
It's not just escrow that you need and imo escrow is just an optional thing for people to trust you. In the long run when you have made a positive reputation in a certain platform for example here in the forum. People will gradually trust you, the people who use a escrow will decrease. What you need is a valid collateral. Something that is easy to sell so a identification document is not valid.