Its depend on your your own think. However these days bitcoin is going high and this is profitable for everyone. after halving price may be came down. So profit of investing in BTC depend on time duration.
But even if you invest bitcoins in sites you are not going to lessen them, right ? Then why even do not invest them ?
I mean price will increase is better for you then. I do not understand this logic of saving them.
it's comeback on your mindset, your plan, your goal.
if you believe bitcoin for long term, if you want to invest for long time, i think you will says everyday is good time to buying bitcoin, because the price will be rise after or before halving.