Yes I think log scales are best to get true perspective of bitcoins because they are increasing rapidly on a short timescale, and shows the bubbles in context of the bigger picture. TradingView doesn't have the option of a log scale (but has excellent features for technical analysis), I guess using TradingView has started me looking at linear scales more than before. I'd say linear is a good approximation on shorter timescales.
TradingView does have log scale, it's just hidden. Go to the gear, then "scales".
Linear is a good approximation for small time scales. It is also good for stable (sideways) behavior. This usually only happens on small timescales with bitcoin, but there have been some periods of long term stability, particularly with the shorting that happened over $5. Eventually, the position got away from them. (cough p@40 cough)