Why do you think Bi-Wiring improves the sound ?

I bi-wire because the speakers are so designed & mfr encourages &  already had the wires from last setup. Adding a second pair of binding posts just to enable bi-wiring strikes me as nutty, as others have said. 
Nobody thinks bi-wiring is harmful, so if you've got the stuff already, go for it.

No! Bi-wiring does NOT improve the sound if your speaker gauge is sufficient to the situation. As mentioned doubling the gauge of the wire “could” help... but maybe not. It is probably the least expensive “Audiophile” tweak you can try but do try and let the rest of us know it it actually works for you! I’m willing to bet it will make no difference in the actual sound. 
** actual results may vary :-)

Not a fan. 

Some years back I had speakers that could be bi-wired or bi- amped. 
    The only advantage I see now from bi- wiring is you will already own the wire if you decide to Bi-amp,Which I eventually did do.If that isn't a future consideration, don't bother. The money is better spent on upstream components, not wire or speaker mods. 

interesting take... https://www.qacoustics.co.uk/blog/2016/06/08/bi-wiring-speakers-exploration-benefits/