Translate the following English sentence to French:
"With regard to the Tobin tax as a means of preventing future currency crises, it has to be realised that the causes of a currency being overvalued cannot be averted through taxation."
Quant à l' utilité de la taxe Tobin pour la prévention des futures crises financières, il faut remarquer que la taxe ne supprime pas les causes de la surévaluation des devises.